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Wall Street's Twitter Jitter Proves The Efficient Markets Hypothesis Correct

There's a large and unfortunate misunderstanding about the efficient markets hypothesis (EMH) . People seem to take it as meaning that markets are efficient methods of doing everything: of providing health care, allocating capital, of distributing food and transplant organs and so on.  And markets might indeed be efficient methods of doing all of those things: I certainly believe so. But this isn't actually what the EMH itself says, not at all. What it does say is that markets are efficient at processing the information about what prices should be in a market.