Week 30 Day 5: Bob the World's Worst Market Timer

Bob invested his life savings at the four worst market peaks in modern history. He bought in August 1987 (just before Black Monday). He bought in December 1999 (just before the dot-com crash). He bought in October 2007 (just before the financial crisis). He bought in February 2020 (just before COVID). He never sold a single share. His portfolio still generated massive returns because time heals all market wounds.

Bob's timeline (investing in a total stock market fund): 1987: invests $6,000 at the peak. Portfolio drops 34% (Black Monday). He holds. By 1989: fully recovered and growing. 1999: invests another $46,000 (savings accumulated over 12 years) at the peak. Portfolio drops 49% (dot-com bust). He holds. By 2007: fully recovered and growing. 2007: invests another $68,000 (more accumulated savings) at the peak. Portfolio drops 51% (financial crisis). He holds. By 2013: fully recovered and growing. 2020: invests another $64,000 at the peak. Portfolio drops 34% (COVID). He holds. By August 2020: fully recovered. By 2024: Bob's total portfolio is approximately $1.1 million on total investments of $184,000. Bob's secret: he was wrong about timing every single time but right about one thing -- staying invested. The only way to lose permanently in diversified equity markets is to sell during a drawdown. Bob never sold, so his mistakes were always temporary. The person who does worse than Bob: 'Ben' who invests $184,000 over the same period but panics and sells during each crash, then waits until the recovery to re-enter. Ben ends with approximately $400,000 -- 65% less than Bob.

The 'Bob' example (popularized by Ben Carlson, 'A Wealth of Common Sense') illustrates the asymmetric impact of time versus timing. The mathematical explanation: for a long-duration investor, the terminal wealth is dominated by the final years of compounding, not the initial entry point. The first dollar invested in 1987 compounds for 37 years; even a 34% initial drawdown is overcome by subsequent compounding in approximately 2 years. The analytical framework: let r_t be the log return in period t, and suppose the investor enters at the market peak and experiences an immediate drawdown of -D. The time to recovery (T*) satisfies: sum(r_t, t=1 to T*) > D. For the U.S. equity market with expected annual log return of approximately 8% and drawdown D typically less than ln(2) (approximately 50% drawdown), the expected recovery time is less than ln(2)/0.08 = approximately 9 years. In practice, recoveries have been faster because they often involve mean-reversion overshooting (Fama and French, 1988). The key insight: the variance of terminal wealth for a buy-and-hold investor decreases rapidly with the horizon. For a 30-year investor, the entry point (peak vs. trough) affects terminal wealth by approximately 15-20%. For a 30-year investor who also panic-sells during one drawdown, terminal wealth is reduced by approximately 40-60%. The entry timing matters far less than the behavioral discipline of remaining invested. This is one of the most robust findings in personal financial planning research.