
Originally Posted by
jasaunders
Index funds don't always include such a large portfolio. Many index funds include only a few dozen stocks, some are heavily invested in only 10 stocks. Sure, some funds track the S&P500 and other indexes, but others track small segments of industries. Different funds are different for different individuals with different goals, strategies and risk levels. I'm not sure you understand the definition of an index fund. Berkshire is far more diversified than many index funds.
Additionally, I don't see how what you are describing is different than a mutual fund portfolio manager. You say "index funds take in winners, losers, and the others into its portfolio." No they don't, most of them adjust their portfolios to try to take all winners and adjust this with risk, because we don't know what the winners are. It's the exact same thing Warren buffet is doing. In fact, if anything, Warren Buffet is worse because he is more of a long-term investor, whereas mutual funds or ETF's adjust their portfolios much more often to try to "pick the winners" and adjust their risk.