A number of prominent trend followers, commodity trading advisers and other computer-driven managers posted very strong gains in September after turning in mixed results the previous month.
More importantly, over the two-month period, the large so-called quantitative funds mostly delivered on their implicit promise: that they are largely uncorrelated with the stock market, enabling investors to offset or hedge possibly big losses from their long-short or long-only hedge funds over the most recent streak of extreme volatility.
