Trump Media Is Now the Most Expensive US Stock to Bet Against

Betting against former president Donald Trump’s social media startup is one of the most difficult and expensive short trades in the market, according to financial analytics firm S3 Partners.

Investors tempted to bet against Trump Media & Technology Group Corp. are facing annual financing costs to borrow the shares of more than 150%, and risks that the stock’s meme-like volatility and loyal fanbase could burn them even more. The newly-public company is the most expensive US stock to bet against, with over $100 million of short interest, S3 data show.

The short trade is expensive in part because ...