Key PointsDiscover, Berkshire Hathaway and JPMorgan Chase are leading the financial sector's recent performance.Discover gapped down on January 19 after reporting a 59% earnings decline and an increase in its reserve for late payments. Institutional investors sent the stock higher in the past five sessions, as a Citi analyst said it's time to buy the dip. 5 stocks we like better than Discover Financial ServicesBank stocks and other financials tracked in the Financial Select Sector SPDR Fund NYSEARCA: XLF ar ...