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Why is the dominant investing advice for individuals to use mutual funds, exchanged traded funds (ETFs), etc
I agree with the other answers, but I want to give a slightly different perspective. I believe that a lot of people are smart enough to beat the market, but that it takes a lot more dedication, patience, and self-control than they think. Before Warren Buffett buys a stock, he has read the quarterly reports for years, has personally met with management, has visited facilities, etc. If you aren't willing to do that kind of analysis for every stock you buy, then I think that you are doing little more than gambling. If you are just using the information that everyone else has, then you'll get the returns that everyone else gets (if you're lucky).