A quick rehash… when a seller defaults on his loan, if he does not cure the default the home goes to what is called a trustee sale. At the trustee sale you can purchase the home but you will need to come up with cash. Most homes at trustee sales go back to the lenders. Once the home goes back to the lender it is known as an REO. The lender can then market the home on the MLS, or submit it to other private auctions such as usahomeauctions.com (aka REDC)…
Anways to answer your question, when a home goes back to the lender at a trustee sale that information is not compiled into monthly sales figures.
Also when I refer to the monthly sales figures I am refering to Dataquick. I do not know if Dataquick compiles information from private auctions. That is a good question. I can tell you for sure that the MLS does not.