We don’t know what hedge fund manager Steven Cohen will do with the money he borrowed from Goldman Sachs. We don’t even know how much it is, though it’s a lot; the personal loan is backed by his $1 billion art collection. But we know how he’ll use it: cheap leverage.

New regulations force banks to get rid of CLOs. They’re similar to subprime-mortgage-backed CDOs that blew up in 2008. But CLOs are backed by junk corporate loans, including malodorous “leveraged loans.” And they’re booming again. So the banks made a deal.

For years, nothing could slow the tsunami of junk debt. But suddenly, something happened, and investors in leveraged-loan mutual funds, where the crappiest junk debt accumulates, ran scared and started pulling their money out. Consequences were immediate.