I wonder what the prevalence of technical analysis is among those surveyed.

JonLaw, I know you'll get this.

But more generally, I would want to know how the analysts controlled for the effect of financial advisors and, in cases where outside advisors were consulted, the quality of the advisory services.

Also, with securities markets best modelled as a random walk plus drift, I don't know that stock portfolio performance is really indicative of anything at all to do with intelligence. It's a random variable, per JonLaw's results.

What is to give light must endure burning.