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Zillow Tumbles After Posting Second-Quarter Loss on Costs

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Zillow Inc., operator of the largest real-estate information website, dropped the most in three months after reporting a second-quarter loss on higher costs related to advertising and acquisition-related compensation.

Zillow fell 7.7 percent to $83.73 at the close in New York. The shares have more than tripled this year, compared with a 19 percent gain for the Standard & Poor’s 500 Index.