LONDON, July 9 : Some hedge fund managers have in recent weeks posted their worst trading results in almost a year, as many got caught in crowded trades amid highly volatile markets, according to Goldman Sachs.Goldman said in a note dated Wednesday that systematic managers — sometimes called quant funds —

LONDON, July 9 : Some hedge fund managers have in recent weeks posted their worst trading results in almost a year, as many got caught in crowded trades amid highly volatile markets, according to Goldman Sachs.Goldman said in a note dated Wednesday that systematic managers — sometimes called quant funds —