Humans are proving more adept than computers in reacting to the Federal Reserve’s mixed messages on when policy makers will reduce their unprecedented stimulus. Currency funds that use computer models for trading decisions made 0.9 percent this year through May, compared with 2.5 percent for those that don’t, the biggest margin since 2008, according to the latest data from Parker Global Strategies LLC. Hong Kong-based Ortus Capital Management Ltd.’s $1.1 billion computer-model fund lost 13.8 percent in the first half, while the FX Concepts Global Currency Fund, which employs a similar strategy, fell 3.3 percent, ... (full story)