What does the government takeover of Fannie Mae (NYSE:FNM) and Freddie Mac (NYSE:FRE) mean for investors? Who are the winners? Who are the losers? In this installment of "Fool Video," senior analysts Bill Mann and Seth Jayson tackle those questions and take stock in Bank of America (NYSE:BAC), BB&T (NYSE:BBT), JPMorgan Chase (NYSE:JPM), and Wells Fargo (NYSE:WFC).