I find it quite useful to think of a free-market economy - or partly free market economy - as sort of the equivalent of an ecosystem. Just as animals flourish in niches, people who specialize in some narrow niche can do very well.

Common stock investors can make money by predicting the outcomes of practice evolution. You can't derive this by fundamental analysis - you must think biologically.

You must value the business in order to value the stock.

Quoting Demosthenes, 'For what each man wishes, that he also believes to be true.' I would rather make money playing a piano in a whorehouse than arguing that no cost is incurred when employees are paid in stock options instead of cash. I am not kidding.

I always like it when someone attractive to me agrees with me, so I have fond memories of Phil Fisher. The idea that it was hard to find good investments, so concentrate in a few, seems to me to be an obviously good idea. But 98% of the investment world doesn't think this way.

It's dangerous to short stocks.

Hard work, honesty, if you keep at it, will get you almost anything.