ResCap is currently considering the option based on a Securities and Exchange Commission filing. Please see story. Analysts also noted the higher uncertainty of further liquidity and capital support from Ally Financial, which is GMAC-RFC's ultimate corporate parent. ResCap recently said that it did not make an April 17 interest payment on its senior notes. Unless paid within 30 days, the missed payment will lead to a default on the notes, the company said. On April 18, Moody's downgraded ResCap's senior unsecured debt rating to 'C' from 'Ca'. The rating of Ally Financial, which is at 'B1', was not impacted (see related story ). Over the review period, Moody's will focus on ResCap's financial stability as well as the company's pursuit of strategic alternatives, and their impact on the master servicing operations. GMAC-RFC's master servicing portfolio reached 303,177 loans for an unpaid principal balance of roughly $52.8 billion as of April 30.