These are some of the top analyst calls for the financial services group we have seen in the early hours of trading this Tuesday morning: American Express (NYSE: AXP) raised to Neutral at UBS. Capital One (NYSE: COF) raised to Neutral at UBS. Comerica (NYSE: CMA) raised to Outperform at KBW. Discover Financial Services (NYSE: DFS) raised to Neutral at UBS Lehman Brothers (NYSE: LEH) raised to Overweight with $31 target at Morgan Stanley, although this was technically a late-Monday call. Prosperity Bancshares (NASDAQ: PRSP) raised to Outperform at BMO Capital Markets. Jon C. Ogg July 1, 2008 ...