Tue May 20 2025

As Global Head of Equity Derivatives Research at Bank of America Merrill Lynch, Ben Bowler is helping the firm’s institutional client base understand the complex risk dynamics that impose themselves on today’s markets. His process often leads him across asset classes, looking for linkages and developing stress indices that may provide early warning signs for US equity markets. Our discussion first considers the recent SPX vol event, which, from a short-term severity standpoint, Ben puts in a category with the GFC and Covid. He further makes the point that since the Tariff uncertainty was self-imposed, it was as if we were in the midst of the Covid crisis but already had the vaccine in hand. We then explore the work that Ben and his team have done on the concept of fragility. Here, he argues that the speed and magnitude of vol spikes, flash crashes and tantrum in markets has increased. In fact, in US single stocks, he suggests that fragility is at an all-time high with the reactio...