The Market's Already Priced What You Know

The Market's Already Priced What You Know
(Colin Ziemer/New York Stock Exchange via AP)
There's an old saying on Wall Street that one should "buy the rumor, sell the news", a pithy way to express the efficient market theorem. By the time an event arrives, whatever it may be, the market will have fully digested the news and incorporated it into current prices. And then the market will move
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