DreamWorks Animation, the film studio, fell the most in five months after quarterly results missed estimates. ‘‘Madagascar 3: Europe’s Most Wanted,’’ one of just two DreamWorks releases this year, has generated $501 million worldwide; that lags behind last year’s ‘‘Kung Fu Panda 2.’’ Net income shrank 63 percent to $12.8 million from a year earlier. Revenue fell 25 percent to $162.8 million.