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Prof. Burton Malkiel: 50 Years of A Random Walk Down Wall Street (EP.252)

The Rational Reminder Podcast

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The Paradox of Indexing the Market

The paradox is that obviously if everybody indexed, who would make the market efficient? And so I understand that you do need some active managers. In fact, suppose it was 100% indexed, and we go back to my original example, there's the drug company that's found the cure for cancer, the stock should be in 40, not 20. Can you imagine in a capitalist system, there isn't somebody who would then say, hey, wait  there's an opportunity here, I'm going to go in and buy the stock until it gets up to 40?"

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