About 80% of Ballmer's money ($150 billion -former Microsoft CEO) is in Microsoft stock and 20% in index funds. He tried investing in stocks, Colgate Palmolive at advice of Jim Cramer a college buddy. Then tried diversifying. Tried money managers and found it difficult to find ones that outperform. So he dumped them all. His approach was shaped by Warren Buffet who says put it in S&P shaped index fund. He says- Keep it Simple. Keep it Simple. We are financially blessed. What I seek says Ballmer is not to have anxiety, not to have to spend a lot of time, where we are blessed enough if we make 7%, the standard S&P return in the long run. He had luck listening to the right people and his loyalty to the company. When Balmer left office as CEO in 2014 Microsoft market capitalization was $300 million. Ten years later it is $3 trillion with work on cloud computing and AI. Microsoft gained 29% each year in that period including dividends, the S&P 13% with dividends, endowments 8%. As investor non-investor Ballmer now exceeds $150 billion and is No. 9. Most investments are in one trick ponies Google for example or in two trick ponies Apple, Amazon or Microsoft. One trick pony means they milk it, and milk it, and milk it. Three trick ponies not many you can find. ...