Specialty mortgage servicer Nationstar Mortgage (NSM) topped fourth-quarter estimates early Thursday, but shares fell 5.9% amid weak servicing income and press reports on possible loan auctions. Credit Suisse analysts noted that over $1 billion in securitized nonperforming residential loans have shown up at Auction.com, saying "anecdotal evidence" suggests many "were offered by Nationstar." Nationstar's servicing-side profitability stayed weak,