So if I promise to criticize myself, can I get a blogging gig at EconLog?
I understand the Efficient Markets Hypothesis, and I think it’s a very good way to take a first crack at the markets. The thing that annoys me about many EMH proponents is that they think they are being empirical and scientific, when they often are clearly able to explain any outcome in their framework. Steady growth? Just what EMH predicts. Massive crash? Just what EMH predicts. In practice, the EMH is non-falsifiable, which is ironically the criticism many of its proponents level at others.
I think this following passage from Scott is a tad slippery:
Murphy seems to suggest that the fact that Austrian economists were not surprised by the volatility is a point in their favor. But why? Who was surprised? If you had asked me a year ago “Do you expect occasional volatility, up and down?” I would have said yes, and also that I had no idea when that volatility would occur, or in which direction the market would move.
Look, there was nonstop coverage of this on NPR when it happened. They were trotting out all kinds of people, including Austen Goolsbee, to make sure Americans kept their money in Wall Street. I’m not making this up, give me a break.
Monday showed the biggest intraday point swing in history. (Granted, you would want to look at percentage swing for a better comparison, but I can’t find such a ranking.)
And according to this guy’s analysis, by one measure of market volatility–the VVIX–Monday blew the previous record out of the water:
If you want to say I’m a broken clock, or that we should wait and see what things look like in three years, etc., that’s fine. But come on, don’t act like predicting “more of the same” two weeks ago is consistent with what just happened.