BofA: Attitudes Changing Towards Default

Within the next couple of years, probably somewhere between 10 million and 20 million U.S. homeowners will owe more on their homes, than their homes are worth. (See Homeowners With Negative Equity)

One of the greatest fears for lenders (and investors in mortgage backed securities) is that it will become socially acceptable for upside down middle class Americans to walk away from their homes.

If every upside down homeowner resorted to "jingle mail" (mailing the keys to the lender), the losses for the lenders could be staggering. Assuming a 15% total price decline, and a 50% average loss per mortgage, the losses for lenders and investors would be about $1 trillion. Assuming a 30% price decline, the losses would be over $2 trillion.

Not every upside down homeowner will use jingle mail, but if prices drop 30%, the losses for the lenders and investors might well be over $1 trillion (far in excess of the $70 to $80 billion in losses reported so far).