The value of loans that collateralize commercial mortgage-backed securities priced by The Debt Exchange through the end of November fell slightly from the prior month, the loan sale adviser said. In November, DebtX priced 55,886 commercial real estate loans with an aggregate principle balance $662.5 billion that collateralize 616 CMBS trusts. The company said the loan values fell to 80.3% from 80.9% at the end of October but up from 77.7% a year earlier. The values are based on loans priced by Boston-based DebtX. "The decline in the value of commercial real estate loans in November was due primarily to an increase in Treasury rates," said Kingsley Greenland, DebtX chief executive. "Rising Treasury yields were partially offset by tighter whole loan spreads for higher quality assets." Write to Jason Philyaw.