Stocks end volatile week higher despite bank fears.

U.S. stocks closed higher on Friday, marking the end of a tumultuous week as Federal Reserve officials calmed investor fears over a potential liquidity crisis in the banking sector. While all three major U.S. stock indexes started the session sharply lower on the heels of a sell-off among European banks, those losses reversed by closing bell, repeating the intraday roller coaster ride of recent sessions. At the conclusion of an up-and-down week, marked by a Fed interest rate hike and mounting worries over the health of the banking system, all three indexes notched weekly gains.