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“Only buy something that you’d be perfectly happy to hold if the market shut down for 10 years.”

— Warren Buffett

A critical pearl of wisdom from Warren Buffett teaches us that with any potential stock investment we may make, as soon as our buy order is filled we will have a choice: to remain a co-owner of that company for the long haul, or to react to the inevitable short-term ups and downs that the stock market is famous for (sometimes sharp ups and downs).

The reality of this choice forces us to challenge our confidence in any given company we might invest into, and keep our eyes on the long-term time horizon. The market may go up and down the interim, but over a decade-long holding period, will the investment succeed?

Back in 2009, investors may have been asking themselves that very question about Iron Mountain Inc (NYSE: IRM). Let’s examine what would have happened over a decade-long holding period, had you invested in IRM shares back in 2009 and held on.

Start date: 04/27/2009
$10,000

04/27/2009
$24,111

04/25/2019
End date: 04/25/2019
Start price/share: $23.87
End price/share: $32.65
Starting shares: 418.94
Ending shares: 738.42
Dividends reinvested/share: $18.43
Total return: 141.09%
Average annual return: 9.20%
Starting investment: $10,000.00
Ending investment: $24,111.62

As we can see, the decade-long investment result worked out well, with an annualized rate of return of 9.20%. This would have turned a $10K investment made 10 years ago into $24,111.62 today (as of 04/25/2019). On a total return basis, that’s a result of 141.09% (something to think about: how might IRM shares perform over the next 10 years?). [These numbers were computed with the Dividend Channel DRIP Returns Calculator.]

Dividends are always an important investment factor to consider, and Iron Mountain Inc has paid $18.43/share in dividends to shareholders over the past 10 years we looked at above. Many an investor will only invest in stocks that pay dividends, so this component of total return is always an important consideration. Automated reinvestment of dividends into additional shares of stock can be a great way for an investor to compound their returns. The above calculations are done with the assuption that dividends received over time are reinvested (the calcuations use the closing price on ex-date).

Based upon the most recent annualized dividend rate of 2.444/share, we calculate that IRM has a current yield of approximately 7.49%. Another interesting datapoint we can examine is ‘yield on cost’ — in other words, we can express the current annualized dividend of 2.444 against the original $23.87/share purchase price. This works out to a yield on cost of 31.38%.

Here’s one more great investment quote before you go:
“I learned early that there is nothing new in Wall Street. There can’t be because speculation is as old as the hills. Whatever happens in the stock market today has happened before and will happen again. I’ve never forgotten that.” — Jesse Livermore