Commodity trading advisers (CTAs) - funds that try to profit by buying or selling when there is a clear direction in markets - slumped 4.3% in the three days to Monday, according to analysis from UBS.
"We have seen certainly on (last) Friday and Monday capitulation trades from hedge funds, so all hedge funds have been short duration positioned and we have heard a lot of desks needed to shut down their risk," said Kaspar Hense, a senior portfolio manager at BlueBay Asset Management.
Hedge funds felt this "brutally" in Japanese markets, Hense said, where positioning from hedge funds and CTAs had been particularly "one sided" in anticipation of an end to the Bank of Japan's yield curve control policy.
British macro hedge fund manager Crispin Odey's main fund posted a minus 4.7% February performance and is down 3% so far this year, said a note from his hedge fund to clients.
Very few macro economic funds tracked by bank research seen by Reuters have reported March numbers.