(Adapted from the New York Times of October 25, 2007)

Every time economists and Wall Street executives think they have acknowledged the full extent of the losses from the meltdown in real estate mortgages, more bad news turns up.

In a new report issued last week, the Joint Economic Committee of Congress predicts about two million foreclosures by the end of next year on homes purchased with subprime mortgages. That estimate is far higher than the Bush administration’s prediction in September of 500,000 foreclosures, which in itself would be a tidal wave compared with recent years. Congressional aides provided details of the report yesterday to The New York Times.

The Joint Economic Committee estimates that the lost of real estate wealth just from foreclosures on subprime loans will be about $71 billion. An additional $32 billion would be lost because foreclosed homes tend to drive down the prices of other houses in the neighborhood.

Those figures would cause a decline of $917 million in lost property tax revenue to state and local governments, which will also have to spend more on policing neighborhoods with vacant homes. The states most likely to be hard hit fall into two categories: those where prices had been rising fastest, like California and Florida, and Midwest states with weak economies, like Michigan and Ohio, where people with low or moderate incomes made heavy use of subprime loans to become homeowners and consolidate debts.

“State by state, the economic costs from the subprime debacle are shockingly high,” said Senator Charles E. Schumer, Democrat of New York and the chairman of the Joint Economic Committee. “From New York to California, we are headed for billions in lost wealth, property values and tax revenues.”

Still, subprime mortgages make up a relatively small share of the total housing market — about $1 trillion of the $10 trillion in outstanding mortgages.