Stock indexes staged positive reversals Thursday, erasing their sharp morning losses. The Nasdaq added 0.2% after being down 1.2%. The S&P 500 was flat. For the first time in three weeks, small caps outperformed: The S&P 600 gained 0.9%. The IBD 50 rose 0.2%. Volume was lower on both major exchanges vs. Wednesday’s torrid pace. With the market in correction, IBD-style investors should avoid buying stocks.