Summary: The Dow was up triple-digits in midday trading Thursday, with the S&P and Nasdaq tacking on solid gains as well. Markets responded positively to the European Central Bank's $1 trillion move to keep its stock markets afloat. Also, Southwest Airlines (LUV) stock rose nearly seven points to start the day as the airline had its second big day this week, thanks to its own better-than-expected earnings report. Plus, Johnson Controls (JCI) didn't exactly wow markets with flat revenue, but its explanation of improving market conditions has investors buying back in.
