This reminds me of an old Slate article about a study that compared the % of Harvard MBAs who were working on Wall St with performance of the stock market and found an inverse correlation. The greater the % of Harvard MBAs working on Wall St the worse market performance. The analysis went further and suggested that any time more than 30% of the graduating Harvard Business School class went to work on Wall St, it was time to Sell Sell Sell!

I was working at Microsoft at the time, and the place seemed overrun with a bunch of recently hired Ivy League MBAs (particularly Harvard grads).

The slate piece:http://www.slate.com/id/2109982/