5 Reasons To Avoid Index Funds


Modern portfolio theory suggests that markets are efficient, and that a security's price includes all available information. The suggestion is that active management of a portfolio is useless, and investors would be better off buying an index and letting it ride. However, stock prices do not always seem rational, and there is also ample evidence going against efficient markets.

So, although many people say that index investing is the way to go, we'll look at some reasons why it isn't always the best choice. (For background reading, see our Index Investing Tutorial and Modern Portfolio Theory: An Overview.)

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