Efficient Markets

This paper from David O. Lucca and Emanuel Moench at the New York Fed, concluding that 80% of excess returns to U.S. equities come in the 24 hours before Fed monetary policy announcements, is pretty amazing. Here is the money chart; what does this tell you about the effect of the Fed’s actions on stock prices?

I guess one answer is:
(1) Fed actions push stocks up.

But I submit to you that this answer, by itself, is self-evidently wrong, since the stocks go up before the Fed actions. Two better possibilities are:
(2) The Fed’s actions travel back through time to push stocks up, or
(3) The Fed’s actions are irrelevant to stock prices, but the warm fuzzy feeling people have when they remember that the Fed exists and takes actions pushes stocks up. Read more »

  • 27 Jan 2009 at 12:46 PM

Presented Without Comment: Efficient Markets

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