Millennial Media Tumbles After Jumptap Deal, Sales Shortfall

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Millennial Media Inc. fell the most in almost six months after reporting slower-than-projected sales growth and announcing plans to buy Jumptap Inc., a competitor in the market for mobile-device advertising.

Millennial shares tumbled 19 percent to $6.90 at the close in New York, marking the biggest one-day decline since Feb. 20.