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“I buy on the assumption that they could close the market the next day and not reopen it for five years.”

— Warren Buffett

The Warren Buffett investment philosophy calls for a long-term investment horizon, where a five year holding period, or even longer, would fit right into the strategy. How would such a strategy have worked out for an investment into Carmax Inc. (NYSE: KMX)? Today, we examine the outcome of a five year investment into the stock back in 2020.

Start date: 09/18/2020
$10,000

09/18/2020
  $5,736

09/17/2025
End date: 09/17/2025
Start price/share: $103.07
End price/share: $59.13
Starting shares: 97.02
Ending shares: 97.02
Dividends reinvested/share: $0.00
Total return: -42.63%
Average annual return: -10.52%
Starting investment: $10,000.00
Ending investment: $5,736.27

As shown above, the five year investment result worked out poorly, with an annualized rate of return of -10.52%. This would have turned a $10K investment made 5 years ago into $5,736.27 today (as of 09/17/2025). On a total return basis, that’s a result of -42.63% (something to think about: how might KMX shares perform over the next 5 years?). [These numbers were computed with the Dividend Channel DRIP Returns Calculator.]

One more piece of investment wisdom to leave you with:
“When everyone is going right, look left.” — Sam Zell