Consider these investment questions: If you own shares of all the stocks in a particular sector or industry, do you want to see all the underlying companies flourish? Or do you want to have a perpetual state of some killing off others — to the ultimate benefit of consumers?

And if you have so many assets that you own large percentages of all the companies’ shares in a sector or industry, do you necessarily support the stock prices of weaker players who would otherwise be forced to improve or exit the market?

These are compelling quest… – All MarketWatch News – Personal Finance