Long‐horizon investors have an edge. They can ride out short‐term fluctuations in risk premiums, profit from periods of elevated risk aversions and short‐term mispricing, and they can pursue illiquid investment opportunities. The turmoil we have seen in the capital markets over the last...

Mean-variance investing is all about diversification. Diversification considers assets holistically and exploits the interaction of assets with each other, rather than viewing assets in isolation. Holding a diversified portfolio allows investors to increase expected returns while reducing risks....

Factor investing asks: how well can a particular investor weather hard times relative to the average investor? Answering helps her reap long-run factor premiums by embracing risks that lose money during bad times, but make up for it the rest of the time with attractive rewards. When factor...