Top analyst: Buy McDonald's on all-day breakfast

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With McDonald's shares flat the past three years, the fast food operator is now a great buy, according to a top-ranked analyst of the restaurant sector.

Jason West of Credit Suisse upgraded McDonald's to "outperform" from "neutral" Tuesday morning in a note to clients.

West is one of the top analysts on Wall Street. His picks average a 16 percent one-year return with a 67 percent success rate and he is ranked in the top 5 percent of all Wall Street analysts, according to

Here's why he likes McDonald's now…