Morgan Stanley raised its target price for American Express (NYSE:AXP) to $53 from $51 and maintained its overweight rating.The bank increased its 2011 EPS estimate to $3.69 from $3.47, vs. consensus estimates of $3.67 per share, and its 2012 EPS estimate to $4.21 from $4.11, vs. consensus estimates of $4.08 per share.American Express has a potential upside of 21.3% based on a current price of $43.45 and an average consensus analyst price target of $52.68.