New Jersey, Illinois and Maryland don't get much attention for their middle-of-the-pack foreclosure rates. But CoreLogic said these three states have the highest levels of distressed homes that are not yet listed for sale but make up the shadow inventory.

In January the nationwide shadow inventory of delinquent loans and reposssessed homes not on the market stood at nine months' worth of supply, or 1.8 million homes, the data company said. While that was a slight drop from 2 million homes in the shadow inventory a year earlier, the situation remains grim, said Mark Fleming, CoreLogic's chief economist.

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