That’s a significant number, almost double the short interest in the S&P at the same time last year. Stripping it down to plain English, this is a glaring indication that institutional investors are trying to get ahead of the AI financial bubble, which accounts for roughly 60 percent of the index’s growth since April. And the fact that a growing number of investors aren’t just exiting positions, but are actively betting against the US stock market is a massive tell. This is the situation that has investors — and plenty of regular people — nervous about the AI financial bubble. More on the AI bubble: SoftBank CEO Says You’re Too Stupid to Understand What’s Going on If You Believe the AI Bubble Is Real