Jane Street Loses $15 Billion in First Down Month

Jane Street is a big company that helps people buy and sell stocks and other investments very quickly.

It makes money when it does a lot of trading.

In July, Jane Street lost about 15 billion dollars.

That is a huge amount of money.

It was the first month in about ten years that the company had a really bad month.

One reason is that a special money fund it invested in, called Situational Awareness, made bets on artificial intelligence companies that did not work out.

Jane Street also made some wrong guesses about stocks in Asia.

The company's leaders said July was a bad month and that they would be more careful with their risk-taking.

Even so, Jane Street has still made more money this year than it made in all of last year.