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A
Welcome back to the Deep Dive. Today we are going to look at something that I think for most of us is kind of like the plumbing in our house. We know it's there, we know it's absolutely essential, and we know that if it breaks, we are in some serious trouble.
B
Deep trouble.
A
But we have absolutely no desire to look at the pipes. Not really.
B
That is a very, very fair assessment.
A
We are talking about the architecture of debt. And I don't mean, you know, your credit card bill or that student loan you might still be ignoring. I'm talking about the massive invisible machinery that keeps the entire world running. The market that funds the schools our kids go to, the bridges we drive over, and, well, the governments that print the money in our wallets.
B
It really is the invisible empire.
A
Yeah.
B
You know, everyone talks about the stock market. You turn on the news and it's always the Dow is up, the S and P is down.
A
Right.
B
It's the headline, it's flashy, it's exciting. But the bond market, the fixed income market, it's the big brother. It just, it dwarfs the stock market in terms of sheer capital to where the real money lives.
A
And yet, looking at this stack of research we have for today, it feels like this market is, I don't know, almost intentionally designed to be confusing.
B
Oh, for sure.
A
It's an Alphabet soup. Geos strips, tips, tans, bands. I mean, it feels like they don't want us to understand it.
B
Well, there is a bit of a gatekeeping aspect to it, sure.
A
Yeah.
B
But once you decode the language, and that's really what today is about, just decoding the language, you realize it's actually a study in, like, physics.
A
Physics? How so?
B
There are rules, there are levers, and there are direct cause and effect relationships that are, frankly, much more predictable than the stock market.
A
So that is our mission. We're going to take this stack, which has everything from, I mean, Series 7 exam prep materials, which are just so dense, all the way to CFA Institute valuation frameworks, and even some surprisingly funny Reddit threads about how traders memorize the stuff. And we're going to break it all down. We're going to look at the mechanics, the different types of debt, and the strategy.
B
And we're going to explain why risk free might not actually mean risk free.
A
Ooh, foreshadowing. I like it. Okay, so let's start with the basics, the absolute mechanics of the trade. I want to look at a concept that seems incredibly boring on the surface, but is actually, I think, the source of a lot of confusion. For first time bond buyers accrued interest.
B
The fairness doctrine of the bond market. I like that.
A
So help me understand the problem here. I buy a bond. Let's say it's a standard corporate bond. It pays interest twice a year, right?
B
Typically semi annually. Yes. Yeah, we can say January 1st and July 1st. Just to keep it simple.
A
Okay, so I own this bond. I get a check on January 1st, I'm happy. But then, you know, life happens, I need some cash. So let's say April 10, I decide to sell this bond to you.
B
Okay, I'm buying.
A
So. So I transfer the bond to you, you pay me the price of the bond. Let's just say it's trading at $1,000 par value. But here's the issue. The next interest check from the company, it doesn't come out until July 1st.
B
Correct. And since I am the holder of record on July 1, that check is going to be mailed to me. My name is on the certificate, so to speak.
A
But wait a minute, that's just not fair. I held that bond for all of January, February, March, and then, you know, a third of April.
B
Right.
A
I risked my capital for three and a half months. I earned that interest. So why do you get the whole check? Just because you happen to buy it a couple months before the payout?
B
And that reaction, that feeling of, hey, that's my money, is exactly why accrued interest exists as a concept. It's a settlement mechanism to make sure nobody gets ripped off. Just based on the calendar.
A
So how does it actually work in practice? When I sell the bond to you in April, are you paying me extra?
B
Exactly. When you sell and I buy, I pay you two amounts. I pay the market price for the bond, that thousand dollars, plus I write you a separate check for the interest you accumulated during the days you held it.
A
So you're paying me for my time.
B
I'm essentially advancing you your share of the upcoming July dividend.
A
So I get my money right now directly from you.
B
You get your money right now on settlement day. And then when July 1st rolls around, the issuer sends me the full six month interest check. I keep the whole thing.
A
Then you're not guilty about it?
B
Not at all. Because part of that check reimburses me for what I already paid you in April. And the rest is the interest I earned for holding it from April to July. Yeah, everything is made whole.
A
Okay, that makes perfect sense. It's kind of like if we split a dinner bill. But I leave early. So I just give you cash for my burger and Then you pay the waiter the full amount later on.
B
Ideally, yes, a perfect analogy, but here is where the plumbing gets a little weird. The math isn't as straightforward as just splitting a dinner bill. It's not just dividing by the number of days.
A
This is where I got stuck in the Series 7 notes. There are two different ways to count the days. Why?
B
There are two distinct calendars. And if you use the wrong one, you will get the math wrong. And on a certification exam, or more importantly, a multi million dollar trade, that matters a lot.
A
So the first method is called 3360, right?
B
And this is the method that's used for corporate bonds and for municipal bonds.
A
And it assumes that every single month has 30 days.
B
Every single month. January has 30 days, April has 30 days. Even February has 30 days.
A
That's. That's just absurd. We know for a fact February doesn't have 30 days. Why would the entire financial system agree to use a fake calendar?
B
You have to remember, these conventions started way, way before Excel existed. Way before calculators. Even if you were a clerk in, say, 1920, sitting at a big ledger, trying to calculate interest for a bond, trade between two dates, figuring out, okay, wait, is this a leap year? So February is 29, but March has 31. It was a total nightmare.
A
Just a lot of chances to make a mistake.
B
A ton of chances for human error. So they just standardized it. They said, look, for the sake of our sanity, Every month is 30 days. The year is 360 days. It's close enough.
A
Close enough seems like a really scary phrase in finance.
B
It does, doesn't it? But at corporates and unis, it's the standard. So if you trade a corporate bond that settles on February 28th, the math actually treats it like there are two phantom days left in the month to get to 30.
A
Weird. Okay, but then we have the US government, and they, of course, do things differently.
B
The US treasury is the exception. They use the actual 365 method, which means they count the actual days on the calendar. 31 for January, 28 for February or 29 in a leap year, and so on the real calendar.
A
So for treasury bonds, you actually need to know how many days are in each month. You can't just wing it.
B
You do. And this brings up one of my absolute favorite details from the entire research stack, the knuckle method.
A
I saw this mentioned in that Reddit thread. You're telling me professional traders actually use this?
B
They absolutely do. Even seasoned guys on a trading desk will sometimes, you know, just quickly double Check under the desk for the listener
A
who hasn't done this since, like, third grade. Can you explain the visual?
B
Okay, yeah. Make a fist. Now, look at the back of your hand, at your knuckles. You have a knuckle, then a dip, then a knuckle, then a dip. Got it. The knuckle is a high point. That represents a month with 31 days. The dip is a low point. That's a short month, usually 30 days, but, you know, 28 for February.
A
So you start with the index finger knuckle.
B
Right. Index knuckle is January, which is high. So 31 days. The dip next to it is February. Short Middle knuckle is March 31. The next dip is April 30. Ring knuckle is May 31. The dip is June 30, and the pinky knuckle is July 31.
A
And then what? You run out of knuckles.
B
You jump back to the index knuckle for August, which is also a high point. And that is why July and August are the only two back to back months with 31 days.
A
That is hilarious. I'm just picturing some guy in a $5,000 suit on Wall street screaming into a phone, staring at his fist to figure out if October has 31 days.
B
I guarantee you, it happens more than you think. Yeah, because accuracy matters so much.
A
Right?
B
The source material had a great example of this. They compared a trade settling on the exact same day for the exact same interest rate for the same face amount. But one was a corporate bond using 3360, and one was a treasury using actual365.
A
The dollar amount was different.
B
It was. The accrued interest on the corporate bond came out to $10.69, but the treasury bond came out to $10.82.
A
Okay, so a difference of 13 cents. I mean, it doesn't sound like a
B
lot on one bond.
A
Sure.
B
But now imagine you are an institution trading a block of 100,000 bonds. Oh, that's a $13,000 difference just based on which calendar you used. If you are an algorithm or a trader, you cannot gloss over these details. I mean, it's literally an arbitrage opportunity if you aren't paying attention.
A
Wow. Okay, now, before we leave the mechanics, there's one major exception. The outline mentions trading flat, which I assume means, I don't know, boring.
B
No. Though some might argue that trading flat just means the bond trades without any accrued interest. You pay the price, and that's it. No side calculation.
A
Okay, and when does that happen?
B
There are a few scenarios the first one is bad. The bond is in default.
A
Right.
B
If the issuer is bankrupt and hasn't been paying its interest, I'm certainly not going to pay you for accrued interest. That is probably never going to arrive.
A
That makes perfect sense. What's the second one?
B
The other big one is zero coupon bonds because, well, by definition they don't pay interest along the way. There is no coupon to split up.
A
Which is actually the perfect segue to our next section. The government stack the U.S. treasury. And this is where we see a lot of these zero coupon instruments.
B
This is the bedrock of the entire system, the so called risk free rate.
A
Let's break down the hierarchy first because the names can confuse people. Bills, notes, bonds. It sounds like they're just synonyms, but they mean very different things. In terms of time, it's all about
B
the timeline, the maturity. At the very short end you have T bills, treasury bills. These are one year or less.
A
So like four weeks, 13 weeks exactly
B
4, 13, 26, 52 weeks. And these are the classic zero coupon instruments we were just talking about.
A
So when I buy a T bill, I don't get an interest check in the mail?
B
Nope, you buy it at a discount to its face value. So you might buy a $1,000 t bill for say $990. Three months later it matures and the government just gives you $1,000. That $10 profit is your interest. It's pure, simple.
A
Okay, then we move out to the middle of the timeline.
B
T notes, treasury notes. These range from two years all the way out to 10 years. And now we're in coupon territory. These pay interest, you get a check every six months, just like a corporate bond. Okay, and we really have to pause here and Talk about the 10 year T Note specifically, why is that one so important? Because the ten year treasury is arguably the most important number in the global economy.
A
More than like the fed funds rate in many ways.
B
Yes, the Fed controls the overnight rate, the super super short term, but the market controls the 10 year and the 10 year yield is the benchmark for everything else.
A
Everything like what?
B
Well, when you got to get a mortgage, the bank doesn't look at the Fed rate, they look at the 10 year treasury yield and they add a spread a markup on top of it. If the 10 year yield spikes, your mortgage gets more expensive immediately. That same day, corporate bond yields, car loans, everything is priced off of that tenure.
A
So it's the anchor for the whole system.
B
It is the gravitational center of all
A
of finance and Then at the really long end, we have T bonds, the
B
long bond, 20 to 30 years. These are for the long, long haul. And because they last so long, they're the most sensitive to interest rate changes, the most volatile in price.
A
We'll definitely get into that sensitivity later when we talk about duration. But I want to talk about how these things are sold. The auction. The outline describes the auction process and I have a question about it.
B
Go for it.
A
It says there are two types of bids, competitive bids and non competitive bids. Non competitive means you just agree to take whatever the rate is. Competitive means you set a price you're willing to pay.
B
Right. Big players make competitive bids. Small investors usually do non competitive.
A
Okay. And it says it's a single price auction, which means everyone pays the same price at the end. But that doesn't make sense to me. If I'm the Treasury and I have some big banks, say Goldman Sachs willing to accept a lower interest rate, which saves me the taxpayer money, why don't I just take their low bid and then force the other guys to pay a higher price? Why give everyone the same more expensive deal?
B
That is a fantastic question. And the answer is about preventing something called the winner's curse.
A
The winner's curse? What's that?
B
Okay, imagine if we did it your way. The method is called a pay your bid auction. Let's say Goldman bids really aggressively and accepts a super low yield, 2%. And then they find out that every other bank bid higher and got a better yield, say 2.1%.
A
So Goldman feels like an idiot.
B
Exactly. They won the auction, but they lost money relative to the market. They overpaid or I guess under earned. If that happens repeatedly, what do you think the big banks will do next time?
A
They'll stop bidding so aggressively they'll be more cautious.
B
Right. They'll bid cautiously to avoid being the sucker. And that would actually drive the average yield up over time and cost the taxpayer more money in the long run. By using a single price auction where everyone gets the same clearing price, it encourages everyone to bid their true best price because they know they won't be penalized for being too aggressive.
A
So it's actually a safety mechanism to keep the market honest and competitive.
B
Exactly. It seems counterintuitive, but it leads to better outcomes for the Treasury.
A
Okay, that's clever. Now let's get into the really weird stuff. Strips and receipts. This whole section sounded like some kind of financial alchemy to me when I read it.
B
It kind of is. It's taking a simple whole bond and Frankensteining it into a bunch of little pieces.
A
So explain the concept of stripping a bond. What are we doing here?
B
Okay, so take a standard 30 year T bond. It has two fundamental components.
A
Yeah.
B
The principal, which is the big $1,000 check you get back at the very end and in 30 years.
A
Right.
B
And then it has the coupons. These are the 60 little interest checks. You get one or two, six months for 30 years.
A
Okay, principal and coupons.
B
Now, some investors, like a pension fund, don't want the income stream. They just want a guaranteed lump sum in the year 2055 to pay for some liability, like their retirees, health care. So financial institutions can literally strip the bond, they separate the principal from the
A
coupons, and then they sell them as separate things.
B
Yes. The principal becomes its own security. A zero coupon bond that matures in 30 years. And each individual interest payment also becomes its own separate tiny zero coupon bond.
A
Wait, each one? So one 30 year bond becomes what, 61 different products?
B
Precisely. 61 separate securities. And the acronym strips stands for separate Trading of Registered Interest and Principal of securities.
A
Very catchy.
B
Very. But the key thing to remember here is that strips are directly backed by the US Government. The Federal Reserve itself oversees the book entry system that keeps track of all these little pieces.
A
The outline also mentions something called treasury receipts. Are those the same thing as strips?
B
Functionally, they're the same idea. Legally, they're different. Treasury receipts were actually the precursor to strips. They were created by private banks and brokerages.
A
How did that work?
B
A bank like Merrill lynch would buy a bunch of T bonds who put them in their own vault and then issue their own receipts against them. So they were doing the stripping themselves privately.
A
So if I buy a Treasury receipt, I'm not trusting the government, I'm trusting the bank.
B
You are trusting that the bank actually has the bonds in the vault that they say they do. So there is a tiny theoretical layer of counterparty risk there. Because of that, receipts usually yield just a tiny bit more than strips to compensate for that extra risk.
A
Okay, but here's the part that honestly made me angry when I read it. The tax treatment of these zero coupon bonds. The phantom tax.
B
Yes. This is the hardest pill for any new investor to swallow.
A
Explain this to me, because it seems insane. I buy a strip, it pays me $0 in interest this year, it pays $0 next year. I don't see a single penny of cash for 20 years.
B
Correct.
A
But you're telling me the IRS expects me to pay income tax on it every single April?
B
Yes, every Single year on income you haven't received.
A
How is that legal? How can they tax money I haven't actually got? It feels like a stam.
B
It's based on a concept called accretion. The IRS looks at it this way. You bought a thousand dollar bond for say $500, you are going to get a thousand dollars later. That $500 profit isn't magic. It's interest that is accumulating or accreting in value every year.
A
So they tax the increase in value.
B
They say just because you chose to delay receiving the cash doesn't mean you didn't earn the value each year. So they tax that earned but unrealized value.
A
But I can't pay the IRS with value. I have to pay them with cold hard cash. If I don't have the cash flow from the bond, that means I have to reach into my own pocket from my salary to pay the tax on this thing.
B
Correct. You have negative cash flow. For the privilege of lending the government money, you have to send them more money every year.
A
So why on earth would anyone ever buy these things? It sounds like a truly terrible investment structure.
B
It is a terrible structure for a taxable account.
A
Yeah.
B
You would almost never put a strip in your regular brokerage account. But think about the one place where you don't pay taxes on investment growth annually.
A
An IRA or a 401k. A retirement account.
B
Bingo. In a tax deferred account like an ira, the phantom tax is irrelevant because you aren't filing a tax return for that account each year and in that specific context. Strips are amazing because you can lock in a guaranteed 5% yield for 20 years with zero reinvestment risk. You know, with mathematical certainty exactly how much money you will have on the day you retire. It's a perfect tool for liability matching.
A
So it's all about asset location, putting the right investment in the right type of account.
B
Location, location, location. Do not buy strips in a taxable account unless you really, really enjoy.
A
Pain noted. Okay, let's move from the federal level down to the state and local level, the municipal landscape.
B
And now we are entering the Wild West.
A
Why do you call it the Wild West?
B
Because with treasuries, you have one issuer, Uncle Sam. He can print the money. He's, you know, for the most part, reliable. With munis, you have 50 states, thousands of counties, cities, water districts, school boards, turnpike authorities. It's a huge universe, a massive fragmented universe. And they all have different rules and more importantly, very different credit qualities.
A
And broadly, we can split this entire universe. Into two main buckets. Gos and revenue bonds.
B
Correct. This is the fundamental divide you have to understand.
A
First, let's start with go's general obligation bonds.
B
These are the big ones, the bonds that are backed by the full faith and credit of the issuer.
A
Full faith and credit. Sounds very noble, very patriotic, but what does it actually mean for me, the investor?
B
In a word, taxes. It means the issuer is promising to use its taxing power to pay back that debt.
A
So if a city issues a grow bond to build a new high school, they're promising to tax me to pay for it?
B
Yes. And not just that. They'll try. If they run out of money from their general fund, they are legally required to raise your property taxes to whatever level is necessary to pay the bondholders. The bondholders come first, which is why
A
I assume these almost always require voter approval.
B
Absolutely. You can't just go and raise people's taxes without asking them first. If you go to the voting booth and you see Proposition 4 bond measure for new library. That is a grow bond, you are literally voting to tax yourself.
A
Now, I want to unpack the math of property taxes for just a second because the source material mentions millage rates. I've seen this on my own tax bill and never really understood what a mill is.
B
Yeah, it's simpler than it sounds. Property taxes or ad valorem taxes are based on the assessed value of your home. One mil is equal to one tenth of one penny.
A
Okay, that's not helping.
B
Right, sorry. The easier math is 1 mil equals $1 of tax for every $1,000 of assessed value.
A
Okay, that's better. So if my city has a tax rate of, say, 10 mils, you pay
B
$10 for every thousand dollars your house is worth. If your house is assessed at $500,000 and your tax is $5,000.
A
Got it. So when analysts look at these Go go bonds, they're looking at things like how high that millage rate already is.
B
Exactly. They look at debt per capita collection ratios, and they also look at something called overlapping debt.
A
Overlapping debt?
B
Yeah. Think about your house. It's not just in a city. It might also be in a county and in a separate school district and maybe a park district. All of those can issue their own Google bonds and tax your same property. That's overlapping or coterminous debt.
A
So they're all taxing the same house. You have to add it all up to see the real burden. Okay, so GOs are backed by taxes. What about the other bucket revenue bonds?
B
These are totally different. They're backed by the revenue from a specific project. A toll bridge, an airport, a stadium, a sewage plant. The bondholders are paid strictly from the money that specific project generates.
A
So if I buy a bond for a new toll bridge and it turns out nobody wants to drive on it,
B
you don't get paid. It's that simple. The city is not obligated to use general tax money to bail you out. The risk is completely isolated to that
A
one project that seems much, much riskier.
B
It is inherently, which is why revenue bonds typically pay a higher interest rate than go bonds from the same issuer. You get paid for taking on that specific project risk.
A
And because there is more risk, there's more paperwork. The trust indenture, Right.
B
This is a critical document. It's a legal contract between the issuer and a trustee, usually a bank, who acts on behalf of all the bondholders. It sets out all the rules of the game.
A
And there's a fantastic mnemonic from the Series 7 prep for the key promises, the covenants in this contract.
B
C, R, I, M, E. Let's walk
A
through this using a hypothetical example. Let's say we are building the Deep Dive bridge. We issue a revenue bond to fund it.
B
Okay. So C is just for covenants. Generally, the fact that these promises exist R is the rate covenant. This is probably the most important one. We, the bridge operators, promise the bondholders that we will charge high enough tolls to pay the debt service. And this is the crucial part. If traffic drops, we promise to raise the tolls to make up the difference.
A
So we can't just throw up our hands and say, sorry, bad year. We. We are legally required to hike prices on our customer.
B
You are legally required to. Yeah, it protects the bondholders.
A
Okay. AYA is for insurance.
B
Right. If a barge crashes into the Deep Dive bridge and destroys it, we need to have an insurance policy in place that will pay off the bondholders. You can't just leave them holding the bag for a pile of rubble.
A
Damn.
B
As maintenance, you have to promise to maintain the asset. You can't let the bridge rust and become unsafe, because if you do, people will stop driving on it. The revenue stops and the bondholders get hurt. Engineering or consulting? We have to hire an independent engineer every few years to come in and audit the bridge's physical condition and the financial books to prove to the bondholders that we're keeping our promises and not cooking the numbers.
A
So crime is basically a set of handcuffs to keep the issuer responsible and protect the investors.
B
A very good way to put it.
A
Now within revenue bonds, there is this other concept about the flow of funds. Basically, who gets paid first. The outline mentions gross versus net revenue pledge.
B
Yeah, this is a classic lunch line problem. Money comes in from the toll booth, who gets to eat first?
A
So in a gross revenue pledge, in
B
a gross pledge, the bondholders eat first. They are at the very front of the line. Before you pay the toll collector's salary, before you pay the electricity bill for the streetlights on the bridge, the bondholders get their interest and principal payment.
A
That sounds amazing for the investor, maximum safety.
B
It sounds great on paper, but it's actually very rare. Now think about it. If you pay the bondholders, but you don't have enough money left to pay the toll collector or the electricity bill,
A
the bridge shuts down and then the revenue stops completely.
B
Exactly. It's self defeating. That's why the vast majority of revenue bonds today are net revenue pledges. And in met pledge, operations and maintenance, O and M get paid first. You keep the lights on, you pay the staff, you have to keep the asset running. Then from the net revenue that remains, you pay the bondholders. It's actually safer in the long run because it ensures the facility stays open and generating cash.
A
That makes total sense when you think it through. Now, before we leave newness, we have to talk about the really weird stuff, the complex structures, the hybrids and the oddballs. Let's start with double barreled bonds. This sounds like a shotgun.
B
It kind of acts like one, gives you two shots. Imagine a revenue bond, let's say for a new city hospital. It's supposed to pay for itself with patient fees and insurance payments. That's the first barrel. But the city also says, look, if the hospital has a really bad year and can't cover its debt, we promise to use our city's general tax money to make up the difference. That's the second barrel.
A
So it has two sources of backing. It's a revenue bond with a Guco safety net.
B
Right. It's structurally a revenue bond, but it has the ultimate safety of a Google bond. Very, very secure.
A
Compare that to a moral obligation bond,
B
the legislative guilt trip. This is where a state legislature might say, look, if this affordable housing project goes bust, we are morally obligated to appropriate funds to help bail it out. But we are not legally required to.
A
That sounds terrifying from an investor's perspective. I morally promised to pay you back.
B
It is a little scary, isn't it? If they default, you can't sue them. But the reality is, if a state let one of these default, their Credit rating would get absolutely trashed and it would cost them way more in the long run. So they usually do pay up, but it's not 100% guarantee.
A
And then we have IDR, BS industrial development revenue Bonds.
B
This is basically corporate welfare, but using the muni market. A city issues a bond to build a factory for a private company like a car manufacturer to attract jobs to the area. The bond is then backed by the lease payments from the company.
A
So really the city is just a pass through. When I buy that bond, I'm taking the risk of the car company, not the city.
B
Correct. And because it primarily benefits a private company, the IRS tends to hate these. The interest from these bonds is often subject to the alternative minimum tax or AMT for high earners. So you have to be very careful buying these if you're in a high tax bracket.
A
Okay, let's pivot from the bonds themselves. We've covered what they are. Now I want to talk about how the sausage is actually made. The buying process, the syndicate, the underwriters.
B
Yeah. How these bonds get from the issuer to the public.
A
The outline calls this section the priority of orders. And it seems to suggest that the game is a little bit rigged against the little guy.
B
Rigged is a strong word, but it's definitely hierarchical. There is a clear pecking order.
A
Let's break down the mnemonic that traders use. PGDM Pro Golfers don't miss.
B
This describes who gets the bonds when a new hot issue comes to market. Lets say New York City releases a new bond that everyone wants. There aren't enough bonds to go around for all the orders. So who gets them first?
A
P stands for presale.
B
Presale. These are orders placed by massive institutions. We're talking huge pension funds, insurance giants. Before the final price and yield are even set, they are committing to buy sight unseen.
A
Wow.
B
Because they take that risk and because they buy in enormous bulk, they are first in line.
A
So the big guys always eat first.
B
Always.
A
G is for Group net.
B
A group net order is one where the profit from the sale benefits the entire syndicate of underwriting banks. It's a way of spreading the profit around fairly among the banks involved in the deal. These are next in line.
A
D is for designated.
B
Designated orders. This is where a slightly smaller institution, maybe a large hedge fund, says, I want to buy these bonds and I want the Thales Commission to go specifically to JP Morgan's desk. They're designating a specific firm to get the credit.
A
And M, last in line is for member.
B
Member orders. This is when One of the underwriting banks itself, like J.P. morgan, tries to buy the bonds for its own inventory so it can sell them to his retail customers later. They're dead. Last in line.
A
So wait, if I am a retail investor, just a regular guy calling my broker, I am buying from that member inventory. Which means I am literally at the bottom of the food chain.
B
Basically, yes. If a bond is hot and oversubscribed, by the time it gets down to the member stage, it's all gone. The institutions in the presale and group net buckets bought it all. Retail investors generally only get access to the leftovers. The bonds the big guys didn't want or the bonds that aren't particularly popular.
A
That is somewhat depressing.
B
It's the reality of wholesale versus retail in any market, I suppose.
A
Alright, take a deep breath. We are entering Section 5, the deep end, the architecture. This is the technical heart of the episode. We need to talk about valuation and these things called embedded options.
B
This is where we separate the casuals from the tros. This is the good stuff.
A
The core idea is that a bond is just a contract. And like any contract, you can add special clauses. The two big ones are calls and
B
puts the trapdoor and the escape hatch.
A
Let's start with callable bonds. The issuer's trapdoor.
B
A callable bond gives the issuer, the company or city that borrowed the money, the right to buy the bond back from you early, usually at a predetermined price.
A
Why on earth would they do that?
B
Back about your mortgage. Let's say you bought a house when interest rates were 7%. Two years later, rates drop to 4%. What you immediately do, I refinance.
A
I pay off the old expensive loan and get a new cheap one.
B
Exactly. Corporations and cities do the exact same thing. If interest rates in the market drop, they call the old expensive bonds away from you and they issue new cheaper bonds at the new lower rate. It saves them a ton of money.
A
But I'm the one holding that 7% bond. I love that bond. It's paying me great income.
B
And that is precisely why it's a trap door for the investor. Just when you are enjoying your high interest rate in a low rate world, the issuer snatches it away. You get your principal back, sure. But now you have to reinvest it in a market where rates are only 4%. That is called reinvestment risk.
A
So why would I ever agree to buy a callable bond? It seems like all the benefit is
B
for the issuer because they bribe you. Callable bonds Always have to pay a higher yield than otherwise identical non callable bonds. You are getting paid extra compensation to take on the risk that the bond might disappear on you.
A
Okay, now let's clip it.
B
Puttable bonds, the investor's escape hatch. This gives you the investor the right to to force the issuer to buy the bond back from you early.
A
Okay, so when would I use that?
B
When rates rise. Imagine you own a bond paying a measly 2%. Suddenly inflation hits and new bonds are being issued paying 6%. Your 2% bond is a dog. You are stuck earning peanuts for years.
A
Unless I have a put option.
B
Right, you exercise the put. You force the issuer to pay you the full $1,000 for that bond. Even though it's only worth, say $800 in the open market. You get your cash back and you can immediately go buy that new high paying 6% bond.
A
That sounds amazing. It's a huge advantage.
B
It is. It's a superpower for the investor. And because it benefits you so much, you have to pay for it. Putable bonds always offer a lower yield than non puttable bonds. You sacrifice some income for that safety.
A
Okay, now here is where my brain started to hurt the math. How do you actually value these things? The CFA source talks about using binomial trees. It sounds like
B
the problem is that the future cash flows are uncertain. We don't know if the bond will be called or put. It all depends on what interest rates do in the future. And we don't know that.
A
So how does a binomial tree help?
B
Imagine it like a choose your own adventure book. For interest rates. You start today at node zero. The price is say $100.
A
Okay.
B
Then you draw two branches forward in time. Branch A, interest rates go up by 1%. Branch B, interest rates go down, down by 1%. Now you have two possible future worlds. In each of those worlds, you calculate what the bond would be worth.
A
And you ask if the option gets used exactly.
B
At the end of branch A, where rates went up, you ask, would the issuer call the bond? No, of course not. They love paying you the old low rate. But at the end of branch B, where rates went down, you ask, would the issuer call? Yes, probably, because they can refinance cheaper. So you replace the calculated value with the call price. And then you do it again and again for hundreds of time steps, creating this massive tree of possibilities.
A
So you are mapping out every possible
B
timeline, literally every possible timeline. You build a tree with hundreds or thousands of nodes, calculating the bond's value at Every single step. And then you average it all backward to find the fair value. Today, it's the only way to properly account for the fact that the cash flows might change.
A
And this whole mess leads us to two concepts that I need you to explain simply because the textbook definitions are incredibly thick. Duration and convexity.
B
Okay. Duration at its simplest is a measure of interest rate sensitivity. It tells you how much the bond's price will change when interest rates move. If a bond has a duration of 10 and interest rates go up by 1%, the bond's price will drop by roughly 10%.
A
Simple enough. But the sources say that for callable bonds, that simple duration formula breaks.
B
It totally breaks. You need something called effective duration, because think about it. If interest rates drop, a normal bond's price shoots up. The lower rates go, the higher the price. But what about a callable bond? It hits a ceiling, it hits a hard ceiling. The price can't go much above the call price, which might be say $102, because everyone in the market knows the issuer is just going to buy it back from you at 102. So even if rates drop to zero, the bond price won't skyrocket. It's capped.
A
And that price ceiling, is that what negative convexity is?
B
Yes, that's a perfect visual for it. Picture a graph. A normal bond has a smiling curve. That's positive convexity. As rates fall, its price goes up faster and faster.
A
Okay.
B
A callable bond has a frowning curve. That's negative convexity. As rates fall, the price rise, slows down and eventually flattens out completely. You bang your head on the ceiling.
A
So negative convexity basically means heads I win a little bit, but tails, I lose a lot.
B
That is a perfect, perfect way to put it. Your upside is capped. But your downside if rates rise is basically unlimited, just like a regular bond.
A
That sounds like a really bad trade. Which brings us to the final boss of acronyms from the CFA material. OAS Option adjusted spread.
B
The lie detector test for bonds.
A
Explain this using the car analogy we talked about in the pre show. I think that really helps.
B
Okay, imagine you're buying a used car. The sticker price is $30,000. But the dealer says, actually this car comes with a mandatory non negotiable insurance policy that costs $5,000.
A
Okay, so I have to pay it.
B
Right. So are you really paying $30,000 for the car? No, you're paying 25,000 for the car and 5,000 for the insurance. Yet to separate the two.
A
Okay, I get that.
B
Now apply that To a bond, you see a callable bond that's yielding 6%. At the same time a risk free treasury is yielding 4%. So the spread looks like 2%. That's your compensation for the company's credit risk.
A
Seems okay.
B
But part of that 6% yield isn't payment for the bond's credit risk. It's the insurance premium the issuer is paying you to compensate you for the call option for that trapdoor.
A
Right.
B
OAS option, adjusted spread uses all that complex math, the binomial tree, to strip out the value of that option. It tells you if we remove the value of the trapdoor, what is this bond actually paying you for its credit risk?
A
So the OAS might turn out to be only like 0.5%.
B
Exactly. You might find that the OAS is tiny, which tells you that you aren't really getting paid much for the credit risk of the company. You are mostly just getting paid for the risk of being called. It reveals if the bond is actually cheap or if it just looks cheap because of the embedded option.
A
That is incredibly useful. It stops you from being seduced by a high headline yield. That is just compensation for a trapdoor.
B
That's precisely its job.
A
Okay, we have melted our brains with math. Let's bring it all home with the final section strategy. How do we actually use all this information? The big one is corporate versus Muni.
B
This is the first decision every bond investor has to make. Do you want taxable or tax free income?
A
And it's not just a feeling or a preference. It's a math problem.
B
It's the tax equivalent yield calculation. You have to run the numbers for your own situation.
A
Let's run some real numbers. Let's say I live in a high tax state like California or New York.
B
Okay. A rough neighborhood for taxes.
A
Yeah.
B
Your top federal bracket is 37% plus, let's say 13% for state plus. The net investment income tax was called a 50% marginal tax rate to keep the math easy.
A
Okay, 50% tax rate. I'm looking at two bonds. A high quality corporate bond paying 6% and a high quality muni bond from my state paying 3.5%. The corporate bond pays way more, right?
B
On the surface, yes. But the corporate bond is fully taxable. You earn 6%, but the government immediately takes half of it. So you really only get to keep 3%. The muti pays 3.5% completely tax free. You keep all of it so in your pocket, at the end of the day, the MUDI actually pays more.
A
But if I lived in Say Texas, no state income tax. And I was in a lower federal tax bracket, say 20, 20%.
B
Then the math flips completely. That's 6% corporate bond. You only pay 20% tax on it, so you keep 80% of the 6%, which is 4.8%. That easily beats the 3.5% tax free muni.
A
So there is no best bond. It depends entirely on your zip code and your salary.
B
Correct. And generally, in the current market environment, unless you are in the very top tax brackets, we're talking 35, 40% or more combined, munis often don't make sense on a pure yield basis compared to corporates or Treasuries. You have to do the math.
A
What about safety though? We talked about risk earlier. Which one is safer?
B
Historically, munis have an incredibly low default rate. Investment grade munis default far, far less often than similarly rated corporate bonds.
A
Really? Why is that?
B
It comes down to monopoly power. If Apple releases a bad iPhone, people can switch to Samsung and Apple loses money. If a city has a bad year, well, they're the only government in town.
A
You can't switch water providers.
B
Exactly. They can raise taxes. They have a captive customer base. That resilience makes them very, very safe from a credit perspective.
A
Finally, let's talk about laddering. This is the one strategy everyone in the source material seems to recommend.
B
It's the don't be a hero strategy. It's the time machine strategy. Don't put all your bond money in a single bond that matures in 2035.
A
What should you do instead?
B
Put some in a bond that matures in 2026, some in 2027, some in 2028, 2029 and so on. Build a ladder of maturities.
A
Why is that better?
B
It protects you from the unknown future of interest rates. If interest rates skyrocket next year, great. You have a Bond maturing in 2026, you'll get your cash back and you can immediately reinvest it at the new super high rates.
A
And if rates go down?
B
If rates crash to zero, great. You still have your 2030, 2031, 2032 bonds locked in at the old high rates. And you'll look like a genius. It removed the enormous pressure of having to correctly predict the future.
A
It effectively just averages out your risk and your timing luck over time.
B
Precisely. It's disciplined and effective.
A
Wow. We have covered a massive amount of ground today. I mean, from the weirdness of the
B
30 day month to the democratization and the potential winner's curse of the treasury
A
auction to the guilt trips of moral obligation bonds and the lie detector test of the option adjusted sp.
B
It really is a fascinating, complex architecture when you look under the hood.
A
So what's the big takeaway for the listener from all this?
B
For me, it goes back to that idea of the invisible machinery. The next time you drive over a bridge, don't just see the concrete and steel. See the revenue bond. See the trust indenture that mandates the toll booth fees. See the 30 year financial contract that linked a pension fund in Ohio to a construction crew in Florida. The modern world is literally built on these contracts.
A
And for me it's about reading the fine print. The label bond suggests simplicity and safety. But as we've seen, a callable bond is not the same as a strip. A double barreled U is not the same as a moral obligation revenue bond. If you don't understand the structure, the plumbing, you can get seriously burned.
B
Absolutely. The structure is what determines the risk, not the name on the box.
A
I want to leave everyone with one final, slightly provocative thought. We spent a lot of time today talking about US Treasuries being risk free. The benchmark, the absolute foundation of all the math and finance. But remember that risk free status isn't based on gold bars in Fort Knox anymore. It isn't based on physics or some immutable law of nature. It is priced based entirely on the global faith in the US Government's future ability and willingness to tax its citizens to pay its debts.
B
So it's not math, it's faith.
A
It's faith and a whole lot of 30 day months. Thanks for diving deep with us. Look at your city and your portfolio a little differently today. We'll see you next time.
B
Take care.
Podcast host: capadvantage
Air date: January 26, 2026
This episode dissects the architecture of the bond market—described as the “plumbing” of the financial world—illuminating everything from basic mechanics to advanced risk and strategy for the Series 7 exam. Hosted by a retired NYSE trader and FINRA principal, the session seeks to demystify bonds for new test-takers and finance professionals alike, cutting through jargon and mythology to deliver only the most test-relevant, real-world insights. The tone is irreverent, practical, and loaded with memorable analogies.
"I buy a strip, it pays me $0 in interest this year...but the IRS expects me to pay income tax on it every single April?"
—A (host), [16:10]
Covenants (promises exist)
Rate covenant (maintain tolls/rates to cover debt)
Insurance
Maintenance
Engineering audits
Gross vs. Net Revenue Pledge:
Exotics:
“Negative convexity basically means heads I win a little bit, but tails, I lose a lot.”
—A, [34:45]
“If a city has a bad year, well, they're the only government in town.”
—B, [38:55]
By making the invisible machinery of fixed income visible, this episode empowers Series 7 candidates and investors alike to see beyond textbooks and understand the rules—and rule-breakers—at the heart of bond finance.