Supply of listings shrinks in all but a few markets

Realtor.com: Inventories down in 143 of 146 metros in January

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For-sale listings inventory plummeted in January to a six-year low, according to a monthly report from Realtor.com, with all but three of 146 metros tracked by the listing portal posting annual declines.

In January, an average of 1.48 million homes were listed for sale, a 16.5 percent decline from January 2012 and the lowest total since Realtor.com began tracking national inventory data in January 2007, the report said. The report tracks inventory and list prices for active MLS-listed single-family homes, condos, townhomes and co-ops.