Like what? Give examples.Not exactly true. There are certain types of risks that are impossible to predict. Diversification protects you against those. You give up a small amount of return in exchange for a large reduction in risk. I guarantee you Warren Buffet wouldn't advocate putting all your money in one stock as a strategy.
IMO the best strategy for a small value investor is to have 20 to 30 positions. It's just hard to follow that many companies and industries when you are doing it on your own and have a full time job. I know a guy who basically has a hedge fund with 4 or 5 other guys. They have only their own money in it. It just helps to divide up the research hours.
The fact that one needs 30 positions to diversify is why I said it's nothing but a protection against ignorance.
Having 30 positions doesn't achieve anything except making your broker's pocket fat through commissions.
Unless you're a banker, you don't have time to study 30 companies. I have enough time trying to study the 16 companies we're in.
Why invest in your 30th best idea when you can invest in your 10th?
I have a friend who works at the JPM bond desk. He only has 6 stocks and he's outperformed both me and the market with less risk without having to load up on 30 or a million stocks as you suggest.
He owns MO, COP, SAM, IDT, JNJ and WFC.
The funny thing about you quoting Warren Buffett as an example is that he has 98+% of his assets in one stock.
Your ironing is delicious. Can I have some more please?
Anyone who invested 100% in BRK.A, LUK, MKL, FFH or other such companies that have great capital allocators that make very concentrated(read: "not diversified") bets have outperformed the market and indexes by far.
