Summary: In midday trading Wednesday January 21, investors cheered the market's return to life after opening up in the red -- especially investors in GoPro (GPRO). The maker of action-cameras, which saw shares plummet earlier this year on news that Apple (AAPL) would compete with it, had life breathed back into its stock as it counts down to its earnings announcement coming in early February. And it's also a big day for Microsoft (MSFT) stock although shares haven't made any major moves yet. Later today, Microsoft CEO Satya Nadella and other execs will demonstrate new web products for an eager media audience.
