Eugene F. Fama and Kenneth R. French
The high volatility of stock returns is common knowledge, but many investors may not fully appreciate the implications of return volatility. Investors cannot draw strong inferences about expected returns from three, five, or even ten years of realized returns. Those who act on such noisy evidence should reconsider their approach.
Eugene Fama and Ken French are members of the Board of Directors for and provide consulting services to Dimensional Fund Advisors LP.