By Claire Groden / Fortune
October 1, 2015

If you’ve been avoiding checking your stock performance for the month, it might be comforting to know you’re in good company. Some of the United States’ most prominent hedge fund honchos, including David Einhorn, Daniel Loeb, and Barry Rosenstein, just reported significant losses for September.

The three investors’ funds reported losses in September due to global market volatility set off by concerns that China’s economy is slowing, according to Reuters. Greenlight Capital, the $11 billion fund run by Einhorn, fell 3.6% in September; Loeb’s $17.5 billion fund fell 4.8%; Rosenstein’s $11 billion Jana Partners slid 3.8%.

Einhorn is now down 17% for the year, putting the investor on track for his second losing year ever since opening Greenlight in 1996. The first and only year in which Einhorn has reported a loss was 2008.

Most money managers are still finalizing their month’s numbers. Judging by these early reports, though, it’s likely that big losses were sustained across the investing world.

Contact us at editors@time.com.

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