frederic j. brown/Agence France-Presse/Getty ImagesExisting-home sales increased slightly in December to an estimated seasonally-adjusted annual rate of 6.48 million, according to economists polled by MarketWatch. High home prices and a short supply of properties for sale are expected to hamper buyers for months to come. The Dow Jones Industrial Average DJIA and the S&P 500 SPX were both down slightly in Thursday morning trades.

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