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“When we own portions of outstanding businesses with outstanding managements, our favorite holding period is forever.”

— Warren Buffett

Investors can learn a lot from Warren Buffett, whose above quote teaches the importance of thinking about investment time horizon, and asking ourselves before buying any given stock: can we envision holding onto it for years — even a twenty year holding period possibly?

Suppose a “buy-and-hold” investor was considering an investment into Iron Mountain Inc (NYSE: IRM) back in 2000: back then, such an investor may have been pondering this very same question. Had they answered “yes” to a full twenty year investment time horizon and then actually held for these past 20 years, here’s how that investment would have turned out.

Start date: 11/06/2000
$10,000

11/06/2000
$60,887

11/03/2020
End date: 11/03/2020
Start price/share: $8.92
End price/share: $27.30
Starting shares: 1,121.08
Ending shares: 2,230.99
Dividends reinvested/share: $22.13
Total return: 509.06%
Average annual return: 9.45%
Starting investment: $10,000.00
Ending investment: $60,887.79

As shown above, the twenty year investment result worked out well, with an annualized rate of return of 9.45%. This would have turned a $10K investment made 20 years ago into $60,887.79 today (as of 11/03/2020). On a total return basis, that’s a result of 509.06% (something to think about: how might IRM shares perform over the next 20 years?). [These numbers were computed with the Dividend Channel DRIP Returns Calculator.]

Notice that Iron Mountain Inc paid investors a total of $22.13/share in dividends over the 20 holding period, marking a second component of the total return beyond share price change alone. Much like watering a tree, reinvesting dividends can help an investment to grow over time — for the above calculations we assume dividend reinvestment (and for this exercise the closing price on ex-date is used for the reinvestment of a given dividend).

Based upon the most recent annualized dividend rate of 2.474/share, we calculate that IRM has a current yield of approximately 9.06%. Another interesting datapoint we can examine is ‘yield on cost’ — in other words, we can express the current annualized dividend of 2.474 against the original $8.92/share purchase price. This works out to a yield on cost of 101.57%.

More investment wisdom to ponder:
“In the end, how your investments behave is much less important than how you behave.” — Benjamin Graham