links for 2011-09-03

The proportion of S&P 500 shares outstanding sold short on Aug. 29 rose to 3.03 percent, the most since the end of November and up from 2.37 percent at the beginning of August, according to New York-based Data Explorers, which provides research on short sales and stock lending. Short selling of the gauge reached a three-year high of 5.52 percent in August 2008, before the worst financial crisis since the 1930s drove the stock index to a 12-year low in March 2009.

Among 2,806 funds tracked by the brokerage, 47 percent underperformed their benchmarks by more than 2.5 percentage points this year, the most since the 55 percent recorded in 1998. Only 13 percent of the funds beat the market by the same margin. The underperformance accelerated last month, with the proportion of trailing funds almost doubling from July, according to JPMorgan data.