Russell 2000 will close lower on August 17 as traders pare positions after a strong run in small caps. The index gained 1.1 percent for the week of August 10 to August 14, reaching 3,068.42, and IWM stood at 303.00 on August 13, up 0.29. Barron’s YTD reading of a 7.87 percent gain and TradingKey’s…