The New York Times [registration required] reports that American Home Mortgage Investment Corp. (NYSE: AHM) is shutting its doors thanks to the fear of its lenders -- who provide the wholesale money they lend to home buyers -- that they won't get their money back. Doug McIntyre posted about this here. Several of AHM's peers -- IndyMac Bancorp (NYSE: IMB) and Accredited Home Lenders Holding (NASDAQ: LEND) -- are also in rough shape.

Last October, I began looking for ways to profit from the collapse in the housing market. My best idea -- posted in December -- was to short shares of NovaStar Financial (NYSE: NFI) which dropped from $116 to $7.19. This post got the attention of a reporter from NPR's MarketPlace who dropped by my office this week to interview me about where the next opportunities for short profits might lie.

My answer is that I don't know. That's because the hedge funds, endowments, pension funds, and insurance companies that buy the mortgage backed securities (MBS) constructed from the loans that NovaStar and its peers originate are not disclosing the value of their MBS holdings. To identify short selling opportunities, I'd like to know this information because many MBS holders will be wiped out.