There is also a large supply of foreclosed families who can no longer qualify for a loan. And that is prompting a flood of investors like Mr. Jarvis, who wants to turn as many of these people as possible into rent-paying tenants in the houses they used to own.

Real estate got just about everyone into trouble in Phoenix, and the thinking seems to be that real estate is going to get everyone out.

One real estate agent was showing a foreclosed house to a prospective client when a passer-by saw the open door, came in and snapped up the property. Another agent says she was having the lock changed on a bank-owned home when a man happened by, found out from the locksmith that it was available, and immediately bought it. Bidding wars are routine.