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Apple’s Amateur Analysts Outperform Wall Street Professionals

The most accurate analyst covering Apple Inc. isn’t on Wall Street. It’s Horace Dediu -- a blogger, ex-Nokia Oyj worker and self-described “entertainer” who writes from a home overlooking the Baltic Strait in Helsinki.

Over the past four quarters, Dediu has published the most accurate estimates about Apple, topping analysts from such firms as Morgan Stanley, Citigroup Inc. and Deutsche Bank AG, according to a leader board maintained for the past year by fellow blogger Daniel Tello. After Apple reported first-quarter results yesterday, Dediu, a Harvard Business School graduate, held on to the top spot.