Quote from NeoRio1:
I am not saying fundamental investing is impossible, I am just saying that if you compare your aspirations in fundamental investing to warren buffets success and style then you are in total denial of how good you can actually be. Where should you look to see results that could reflect your potential? Mutual Funds. Mutual Funds are full of people who never actually worked or run businesses. By the way the average mutual fund in the last 9 months is down so that tells you a lot about how well mediocre fundamental investors can do during rough economic times.
The best investment managers and traders have typically never worked at a "normal" business. If what you said was correct, all the top investors would be people with extensive experience in business. But that's not the case - in fact, successful business people are on the whole notorious for making investment mistakes.
Buffett isn't exactly an operational businessman, he's more a business owner/investor - he hires operations guys and delegates too them. In any case, he is clearly a bit of a unique case. The fact remains that most top investors aren't businessmen, and never have been, yet they understand businesses just fine from an investment perspective. Ken Heebner has not worked in the housing industry but he still knew to buy homebuilders from 2000-2005 and then short the crap out of them and the mortgage industry in 2007 and 2008. How many bank managers or mortgage CEOs did the same?