In the past 30 years, defaults on corporate bonds in the US have been substantially above the historical average. Using firm-level data, this column shows that the increase in credit risk can be largely attributed to an increase in the rate at which new and fast-growing firms displace incumbents, a phenomenon defined as ‘disruption’. Incumbent revenue growth suffers when there are many IPOs in an industry, and newly issued bonds in high-disruption industries have higher yields.