Stock Market Today: Indexes Mixed; S&P 500 Barely Holds This Significant Level (Live Coverage)

The stock market closed mixed Thursday, with the Nasdaq composite down 0.5%. The bullish mood that Micron Technology’s (MU) earnings report engendered didn’t spread to many of the major tech stocks. The S&P 500 inched lower and closed almost exactly at its 50-day moving average. The Nasdaq closed below its 50-day line for a third straight day. The Dow Jones…