Posts filed under “Bad Math”
We’re down to the Final Four in this year’s iteration of March Madness, also known as the national collegiate basketball tournament. Our earlier discussion of “The March Madness Theory of Investing“ didn’t sit well with some readers. The lessons we sussed out from the bracket-destroying results included home-country bias, how expert forecasts are about as good as those of nonexperts, and the impact of noise and distraction.
One issue I want to delve into further is why predicting the future seems to be so hard, if not impossible. That particular “lesson” caused quite a bit of pushback.
(P)redicting the future is actually pretty easy in a macro sense. For instance, anyone with a sound understanding of macroeconomics and the capital structure knows, with a very high probability, that stocks will tend to become more valuable over long periods of time because stocks reflect the value of some portion of our overall output.
I don’t see this so much as a factual disagreement as simply defining epistemological elements differently.
At the risk of repeating myself, let’s define just what a prediction is:
Continues here: March Madness and the Perils of Predicting
As one of those folks who has spent a lot of time bashing economic and stock-market forecasters (see this, this, and this), I have no choice but to take issue with an argument made by former hedge-fund manager Jesse Felder, who asserts “that everything is a forecast.” To quote Felder: Can we please stop bashing forecasters already? There is a…Read More
Earlier this week, Greg Zuckerman of the Wall Street Journal pointed out one of the great mysteries of today’s investment landscape: Despite underperforming by a substantial margin, hedge funds keep attracting more investors and assets under management. It is almost as if (to borrow the headline on Zuckerman’s article), “Hedge Funds Keep Winning Despite Losing.”…Read More
Last week, I was in Seattle for an event sponsored by the CFA Institute. The trip was booked long before any of us knew the Seahawks were going to defend their championship title in Super Bowl XLIX. Following the Seahawks’ amazing comeback in the NFC Championship versus the Green Bay Packers on Jan. 18, the city…Read More
“All of the job growth from 2007 to today can easily be attributed to the shale oil fracking situation and the oil Renaissance. If you take Texas and North Dakota out of the data series for job employment, what you see is that we haven’t added any jobs in the United States other than…Read More
Salil Mehta is a popular statistician and risk strategist, who has developed a unique method to teach quantitative techniques. He blogs at Statistical Ideas. ~~~ We’ve started the year with a sizable downward market pattern, which is making market participants think in ill-advised ways. Eight of the first eleven trading days (S&P 500) were negative. If…Read More
Unbelievable jobs numbers..these Chicago guys will do anything..can’t debate so change numbers — Jack Welch (@jack_welch) October 5, 2012 Today’s column is about stupidity. Perhaps that’s overstating it; to be more precise, it is about the conspiracy-theorist combination of bias, innumeracy and laziness, with a pinch of arrogance thrown in for…Read More
Stories based on Black Friday consumer spending numbers are a holiday tradition. Bob talks with investor and Bloomberg View contributor Barry Ritholtz about the problems with stories based on those numbers. NPR/WNYC: Source: On the Media