You can't blame America's homeowners for feeling hopelessly confused. From suburban porches and city terraces, they're gawking at a housing world gone mad. Just 18 months ago, folks on a tony Linden Lane or a leafy Boxwood Court were astounded to see the colonial their neighbors bought for $600,000 in 2000 sell for $1.5 million after multiple bids. Now they're just as bewildered to watch the same model across the street go begging for months at $1.1 million without a single offer.

One way to know where housing prices are headed is to look at their relationship to rents. As Fortune's data show, big declines are needed to bring prices and rents back in line.
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