In the following video, Motley Fool financials analysts Matt Koppenheffer and David Hanson discuss the market's downturn since Feb. 19. Matt tells us whether the banking sector as a whole had things better or worse than other sectors, why Flagstar Bancorp (NYSE:FBC), Bank of America (NYSE:BAC), and BofI Holdings (NYSE:AX) got hit particularly hard, what it means that these stocks have a higher-than-average beta, and why you may need a strong stomach if you're bullish on these stocks.