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Markets Open Mixed; Home Depot, Macy's Earnings Hurt By Weather

Excluding seasonal factors, home prices rose 0.8 percent in December, according to the Case Shiller Index of 20 cities. Home Depot and Macys were hurt by the spate of severe winter storms in January. One Bitcoin exchange has disappeared and investors in Japan are clamoring they lost money to Mt. Gox. In today's action alert, a psoriatic athritic drug is a catalyst for buying biopharma Celgene.