Caxton

The big firms that reported losses last year include Bridgewater Associates, the firm founded by the outspoken billionaire Ray Dalio, and Caxton Associates.

Caxton's CGI fund also profited from the difference between Japanese and U.S. stock prices, the sources said, adding that losses on commodities bets in gold and a yen hedge detracted from performance.

Broadcaster Leander Kandiero, the son of artist Caxton Kandiero, said it was amazing to see the exhibition and explained how Cyrene Mission changed his father's life when he started there aged nine.

"It's been a hectic few days for sure, and sleep has been sorely lacking," said Michael Brown, head of market intelligence at payments firm Caxton in London.

“It just kept saying ‘connection lost, in offline mode’ or words to that effect every 5/10 minutes,” subscriber Michael Brown, a market analyst at currency firm Caxton, told Reuters.