The holy grail of investing is finding 15 good uncorrelated return streams, which reduces about 80% of risk without reducing return, achieving the upside without the downside.
Dalio explains that by diversifying across 15 uncorrelated return streams, an investor can reduce risk by roughly 80% without sacrificing returns — multiplying the return-to-risk ratio by a factor of five.
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Ray Dalio: Find 15 good uncorrelated return streams. ... if you can get out to 15, you can get down to about reduce about 80% of your risk without reducing your return. That means that you increase your return to risk ratio by something like a factor of five. ... So that means you can get the upside without having the downside.
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