What you need to know on Wall Street today

Welcome to Finance Insider, Business Insider's summary of the top stories of the past 24 hours. Sign up here to get the best of Business Insider delivered direct to your inbox. JPMorgan's quant guru, Marko Kolanovic— a man whose opinion is valued so highly that it can move markets — doesn't think investors have learned their lesson from the meltdown that rocked stocks in early February. That's because they've become used to a low-volatility environment — one that hasn't been...