When the Music Stopped: What July’s Hedge Fund Shakeout Really Means

July ended almost flat for the S&P 500, but that calm surface hid real trouble. An index that tracks popular hedge fund bets dropped 12% for the month, the worst showing since 2001. Most of that damage happened in just four trading days, the fastest drop on record, even faster than during COVID. By Thursday, prime brokers were asking clients to put up extra cash as collateral, since leverage in the system was at its highest level since 2016.

What set it off was a single highly levered fund with a large concentrated position in AI stocks. When AI stocks fell, the fund could not cover its losses and its portfolio was taken on by another manager. This caused momentum stocks to crash hard.

Even so, most global stock markets stayed above their long-term moving averages, and the damage did not spread everywhere, which suggests this was more of a one-time shakeout than the start of a bigger crash. That view got support on Friday, when strong earnings sparked a real rally. Earnings season overall has been strong: 58% of S&P 500 companies have reported, and 88% of them beat expectations, on a median by 7%.

Three other things are worth watching. Tensions with Iran are pushing oil prices around, and refinery slowdowns are keeping gas prices high while pressuring interest rates upward. A joint effort by the U.S. and Japan to support the yen worked briefly but did not fix the underlying reason it has been weakening. And there are reports the incoming Fed chair wants to hold far fewer meetings than usual.