Yum might be able to raise prices, which would help it manage a potential Chinese slowdown, she said.
Having a strong brand could help boost Yum, as well as some of its competitors. Rothman said that in addition to Yum, Paneraand McDonald’s have strong brands and should be able to offset increasing commodity prices by raising prices if needed.
Rothman has a positive rating on Yum! Brands, and a $76 price target, which implies another 7 percent upside after Wednesday's surge.
Barclays’ Bernstein, meanwhile, has an “equal weight” recommendation on Yum. Instead, he likes companies with diversified brands. In casual dining, he recommends Brinker, which operates the Chili’s restaurant chain.
He is also positive on McDonald’s. “It wasn't their best year in 2012, but we expect a bounce-back in 2013 benefiting from improving sales trends and pricing power to protect margins,” he said.
—By CNBC.com’s Justin Menza
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