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" One portfolio is better than another one when it offers higher mean return for a given level of volatility—or a lower volatility for a given level of return. "

William Poundstone , Fortune's Formula: The Untold Story of the Scientific Betting System That Beat the Casinos and Wall Street


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William Poundstone quote : One portfolio is better than another one when it offers higher mean return for a given level of volatility—or a lower volatility for a given level of return.