Major indexes showed bullish action again Wednesday, even if the S&P 500 posted a slight loss. Leaders traded in quiet fashion. Given the market’s strong gains in recent weeks, quiet is good. The IBD 50 outperformed with a gain of 0.4%. Within the list of premier growth stocks, only six of the 50 saw heavy trading. The Nasdaq composite erased a soft morning loss to end 0.3% higher.