Episode Overview

Podcast: Capital Allocators – Inside the Institutional Investment Industry
Host: Ted Seides
Guest: Jonathan Lewinsohn (Co-Managing Partner, Diameter Capital Partners)
Episode: Credit Microcycles at Diameter (EP.484)
Date: February 2, 2026

This episode features Jonathan Lewinsohn, co-managing partner of Diameter Capital Partners, in an in-depth conversation about credit investing, microcycles across sectors (including software, housing, telecom, chemicals, healthcare), trends in private credit and direct lending, the evolving creditor landscape, and the pivotal role of macro awareness. The discussion blends high-level strategy, market anecdotes, and practical examples, with Lewinsohn’s characteristic blend of humor, candor, and market insight.

1. Evolution of Diameter Capital & Product Philosophy

[05:36 – 09:20]

• Diameter has grown from managing a hedge fund and dislocation fund to a diversified credit platform, now including CLOs and direct lending.
• Emphasis is on “complement, not cannibalize, and not distract”: new products must enhance, not detract from, core strategies.
• CLO business developed organically as an extension of their capital markets expertise.
• Direct lending, once a niche, now key as market needs have evolved.
  • “Direct lending…got very hyped up. Now it’s gone all the way to the point that people are so afraid of it, they miss what’s great about the business...It’s now underrated from being perhaps overrated and too overhyped.” (Lewinsohn, 08:17)
• Strict discipline on new strategies: "If you see us running a Chinese equities business one day, you should give me a call and say, how does that fit in?"

2. The Private Credit Landscape & Capital Solutions

[09:20 – 14:35]

• Historical view: Direct lending filled voids left by banks post-financial crisis.
• Post-2010, direct lending evolved with improved asset-liability matching, becoming a vital, durable asset class, albeit with cyclical wariness.
• Rise of "Capital Solutions" as a secular trend: helping sponsors work through companies overburdened with 2021-22 era leverage, who can’t refinance in high-rate 2026.
  • “This capital solutions secular trend is coming down the pipeline.” (Lewinsohn, 12:37)
• Data-driven analysis to validate market shifts in leverage and debt service coverage since 2021.
• Risk management is paramount at Diameter; “We risk manage everything, including direct lending.”

3. Untested Risks in Direct Lending and AI’s Role

[14:35 – 19:22]

• The recent boom ("untested") in direct lending lacks a track record through a real downturn.
• Overconcentration in non-cyclical themes—especially software/SaaS—could backfire.
• The AI disruption: Legacy software exposed to both industry debt and rapid technological change.
  • “What creates a microcycle in an industry? A lot of debt meeting technological change or policy volatility.” (Lewinsohn, 18:00)
• Diameter limits software exposure in their direct lending well below industry averages (sub-10% vs avg. 30%).

4. Dissecting Software Lending and AI Disruption

[19:22 – 22:43]

• “The hard part...you have to answer the AI question, which is one of the biggest questions in our economy to answer.”
• Uses self-driving cars and U.S. shale revolution as analogs for slow, uneven technological disruption.
• Lenders must focus on whether new native-AI competitors can quickly obsolete existing SaaS providers—even (and especially) in mission-critical segments.
• Lessons from past disruptions (e.g., Yellow Pages and internet ads) are directly applicable—incumbents may overestimate their ability to transition.

5. Credit Opportunities in AI Infrastructure

[22:43 – 24:54]

• Investing in AI-related infrastructure (“the super duper microcycle”) is a core stress/distress theme.
• Safest play: Amortizing, hyperscaler-guaranteed data center loans.
• More speculative/avoided: Chip residual finance, unpredictable asset values (e.g., “do we have any clue what an H100 is going to be worth in three years?”)
• The overarching risk lens: Will only price (almost) anything—but avoid what can’t be underwritten sensibly.

6. Microcycles Explained—Genesis and Opportunity

[26:15 – 29:32]

• Definition: Microcycles are sector-specific, distress-driven credit cycles created when industries with heavy debt face technological or policy shocks.
• Classic examples: Muni market turbulence, Eurozone periphery, 2015-16 energy, California power crisis, retail/real estate, post-COVID telecom, current housing/software.
  • “The best opportunity for distressed has been microcycles.” (Lewinsohn, 26:26)
• Importance: Microcycles yield attractive margin-of-safety situations for credit investors able to understand both assets and liabilities.

7. Deep Dive: The U.S. Housing Microcycle

[29:29 – 34:12]

• Market freeze: Existing home sales dropped to crisis-era lows post interest rate hike and post-refi boom.
• “Half [of transactions] come from deaths, divorces, and homes that don’t have mortgages.” (Lewinsohn, 31:53)
• Very few “discretionary” movers left—leads to pent-up demand, likened to a “coiled spring.”
• Focused opportunity in building products sector, especially those with LBO debt overhang.

8. Investment Selection in Microcycles

[34:02 – 35:57]

• Credit approach prioritizes high return on capital over generic metrics.
  • “What is the return on invested capital for the business? ... Does the business earn a good return? If it does…why?” (Lewinsohn, 34:25)
• Seeks fundamentally sound, over-levered businesses trading at discounts, with a focus on avoiding messy restructurings.
• Example: Telecom’s post-COVID microcycle yielded outperformance by focusing on companies benefiting from AI/fiber transitions.

9. Distinction Between Credit and Equity Underwriting

[36:55 – 39:09]

• Diameter’s approach is “investor first,” borrowing from equity due diligence: “Is it a good business?” Even as a credit investor, poor businesses cause losses.
  • “Starting with first principles of what makes a good business…do they earn a right to a high return on capital?” (Lewinsohn, 37:51)

10. Current and Emerging Microcycles

[39:09 – 43:26]

• Telecom: Ongoing disruptions from fixed wireless, fiber, AI-driven shifts.
• Chemicals: Chinese oversupply and movement up the value chain threatens global base/specialty chemical margins.
  • “There’s going to be enormous upheaval in the global chemical market…” (Lewinsohn, 42:47)
• Software: Downturn not “fully developed” but a space of emerging risk.

11. On Shorting and Portfolio Construction

[43:19 – 45:30]

• Shorting is a core tool in the hedge fund but not in other Diameter products.
  • “People don’t like talking about shorting because...you want to be an optimist. But we do short. We short companies...where the way they make money...there are fundamental changes.” (Lewinsohn, 43:34)
• Shorts often arise after identifying fundamental threats, not mere quarterly misses.

12. Healthcare Microcycle: Navigating Policy Volatility

[45:30 – 49:11]

• Healthcare’s distress relates to policy volatility—even supposedly “safe” segments face risks as every administration swings priorities.
• Focus on multi-payer, large, predictable businesses with consistent, sensible returns on capital.
  • “Inflation in healthcare costs...may start to bite the consumer, impacting demand in new ways.” (Lewinsohn, 48:34)

13. Competition Among Creditors & Evolving Creditor Norms

[49:11 – 53:52]

• Credit markets have shifted from “norms” to battle-hardened, contract-based warfare.
• Rise of “co-ops”: Cooperative creditor agreements to prevent infighting and facilitate rational restructurings.
• Diameter’s repeat-player reputation allows it to drive better outcomes in stressful situations.
  • “One thing you’re seeing is co-ops...to say to the company, we as creditors will give you a capital solution…” (Lewinsohn, 52:22)
• “Pounding your chest” phase part of every major restructuring.

14. Insurance-Driven IG Credit Explosion and “The Stump”

[56:37 – 63:30]

• Massive growth in insurance demand for investment-grade (IG) private credit.
• Creates opportunities but also “muffin top and stump” problem: Attractive senior tranches, but problematic, illiquid residuals (“the stumps”).
  • “What do you do with the stump? ... We think that Wall Street is getting short on places to stick the stumps.” (Lewinsohn, 58:55)
• Potential consequence: Poor returns for certain special situation and interval funds, but not systemic risk on the scale of 2008.

15. Macro Awareness in Credit Investing

[63:30 – 67:22]

• Macro assumptions are fully integrated into all underwriting decisions; “you can’t outsource your macro.”
• Desk-level rigor: “I go into it, I have my own models, I create my own charts...I don’t want to be someone who’s receiving a PDF or a deck and just reading.” (Lewinsohn, 64:06)
• Firm-wide consistency on macro inputs, using it as an input rather than a direct trading edge.

16. Scale, Relevancy, and Competitive Advantage

[67:22 – 70:31]

• Absolute AUM less important than “relevancy” and access to best deals in chosen markets.
  • “The question is, are you relevant to get the best deals that you want to put together your portfolios? And we are.” (Lewinsohn, 69:10)
• Caps funds to avoid bloat and retain edge; repeat interactions with sponsors and counterparties drive deal flow.

17. Notable Quotes & Memorable Moments

• On microcycles:
  “The best opportunity for distressed has been microcycles.” (26:26)
• On AI and software distress:
  “There’s a lot of debt in software. Boy oh boy is there a lot of technological change.” (18:00)
• On humility in credit investing:
  “There’s no such thing as bad bonds. There’s bad prices.” (24:57)
• On returns:
  “What is the return on invested capital for the business? ... That’s really the sweet spot.” (34:25)
• On credit politics:
  “You can’t have a credit conference without a panel on creditor violence… this is credit nerds trying to pretend they’re warriors.” (49:33)

18. Lightning Round (Personal Insights)

[71:09 – 77:06]

• Favorite hobby: Admits to being “the hobbyless man.” Enjoys skiing, running, reading, but not a perfectionist about any.
• First paid job: Internship at NYC Economic Development Corp in 1997. Learned how deadly office politics can be to organizations.
• Biggest pet peeve: People attending Zooms with cameras off: “The whole purpose of the zoom is that we can have a more intimate discussion looking at each other and seeing facial expressions…”
• A mystery he wonders about: How democracy will deal with AI, unemployment, and the evaporation of a shared set of facts: “How our system is going to see through this...is a mystery I am not certain we’ll be able to see through.”
• What the next five years are about: Staying at the forefront of technology, continuous learning:
  • “If they outsource the managing partner of an investment firm, I’m screwed...I hope in five years...we are at the forefront of using this technology to produce alpha for LPs.”

19. Timestamps for Important Segments

• [05:36] Diameter’s evolution, business philosophy
• [09:39] Private credit, direct lending, capital solutions
• [14:55] Risks in private credit / untested cycles
• [19:22] Software lending and the AI challenge
• [22:52] AI infrastructure finance
• [26:20] Microcycles: definition, examples, strategy
• [29:32] Deep dive: U.S. housing microcycle
• [34:12] Investment selection and return on capital
• [39:12] Current and emerging microcycles (telecom, chemicals)
• [45:34] Healthcare microcycle & policy volatility
• [49:33] Creditor competition and agreement norms
• [56:55] Insurance-driven IG expansion and “the stump”
• [63:45] Macro awareness in credit underwriting
• [67:37] Scale, relevancy, and staying competitive
• [71:09] Personal lightning round

20. Final Thoughts

Jonathan Lewinsohn illustrated how a modern, macro-aware, sector-cycling credit investor navigates ever-changing markets—by focusing on microcycles, risk management, cross-product synergies, and the unending march of technological and policy disruption. The conversation is a treasury of both strategic thinking and operational anecdotes, valuable for allocators, LPs, and anyone interested in 21st-century institutional credit investing.