Homes in the US haven't been this valuable since before the financial crisis.
That's according to new data from Zillow, which finds the median US home value climbed 8.7% to $215,600 in April, the quickest year-over-year increase since June 2006.
While this is a bad sign for prospective buyers, it's positive for existing homeowners, because it opens up the possibility of a so-called cash-out refinance.
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