SAN FRANCISCO (Standard&Poor's) Sept. 17, 2014--Standard&Poor's Ratings Services said today that it assigned its 'A' debt rating to Ameriprise Financial Inc.'s (AMP) recent senior unsecured debt issuance of $550 million. The issuance has a 10-year maturity with a 3.7% coupon, and the company will use the proceeds for general corporate purposes. We believe that AMP has been opportunistic in its issuance to take advantage of low interest rates, and its general corporate purposes may include prefunding its $350 million debt maturity in November 2015. AMP maintains a competitive business profile encompassing a diversified product set offering wealth and advice management, brokerage, and protection products through its well-branded distribution network. Pretax operating income increased to $1.3 billion