Cliff Asness: Missing the Best Days Isn’t the Real Problem
Clifford Asness of AQR Capital Management revisits his 1999 rejected paper that challenged one of the most common arguments against market timing. The widespread belief that missing just a few of the market’s best days destroys long-term returns is fundamentally flawed, according to Asness.
His analysis shows that while missing the best performing days does hurt returns, missing the worst performing days provides symmetrical benefits. The author demonstrates through both historical data and simulations that this “evidence” against market timing is mathematically obvious and essentially useless for investment decision-making.
Asness argues that legitimate criticisms of market timing should focus on investors’ lack of skill rather than cherry-picked scenarios of perfect incompetence. His 25+ years of out-of-sample data confirms these findings, showing the argument remains as flawed today as it was when first proposed.