Berkshire Hathaway became the lead bidder for Residential Capital’s loan portfolio this week while Nationstar Mortgage remained the stalking horse bidder for ResCap’s mortgage servicing rights and origination platform. ResCap’s parent company Ally Financial was previously the top bidder for ResCap’s loan portfolio. Auctions for the MSRs, origination platform and loan portfolio are expected in October. An investigation by the Consumer Financial Protection Bureau helped a borrower receive a ... [Includes two briefs]