WEX's growth strategy, reliance on dividends from WEX Bank, and exposure to volatility in fuel prices are offset by the company's strong market position in the fleet cards market, high margins, well-managed credit risk, and more diverse funding profile compared with other finance companies. We assigned a 'BB' issuer credit rating, with a stable outlook, on WEX Inc. We also assigned a 'BB' rating on the company's existing $1.1 billion senior credit facility and proposed $350 million, fixed-rate, 10-year senior unsecured notes. The stable outlook reflects our expectation that WEX will maintain its strong operating performance and continue to benefit from low-cost bank funding. NEW YORK (Standard&Poor's) Jan. 23, 2013--Standard&Poor's Ratings Services today said it assigned