Sellers are putting more homes on the market. But it's proving difficult to find buyers.

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• Sellers put up considerably more houses than were bought last month, Zillow found.
• This resulted in a housing inventory increase of 9% year-over-year.
• Buyers are still being held back by affordability challenges even as more homes come available.

The housing market saw a pronounced buyer-seller mismatch last month, and it's proving difficult to draw prospective home buyers off of the sidelines, according to Zillow.

That...