Stocks plunge in worst day of February, but GameStop surge returns: CNBC After Hours

CNBC.com's Pippa Stevens brings you the day's top business news headlines. On today's show, Bob Pisani explains GameStop's sudden resurgence of strength, by pointing out that there is no real reason the stock is suddenly soaring again. Plus, Brian Sullivan is on the ground in Texas with some answers on how the state's power grid failed during last week's severe winter storm.