The major indexes fell again Wednesday as the S&P 500 logged its fifth loss in six sessions. Yet market conditions for growth-stock pickers remain positive. The S&P 500 slipped 0.4% as volume on the New York Stock Exchange crept higher. Disappointing private sector jobs growth from ADP may have disappointed traders. The Nasdaq composite eased 0.3%, less than Tuesday’s 0.6% drop. Nasdaq trading cooled.