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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

The wisdom of Warren Buffett reflects a value-based philosophy about investing that says investors are buying shares in a business, and encourages strategic thinking about investment time horizon. Before placing a buy order for a stock, a great question we can ask is whether we would still be comfortable making the investment if we couldn’t sell it for many years?

A “buy-and-hold” approach may call for a time horizon that spans a long period of time — maybe even lasting for a ten year holding period. Suppose such a “buy-and-hold” investor had looked into buying shares of Pentair PLC (NYSE: PNR) back in 2011. Let’s take a look at how such an investment would have worked out for that buy-and-hold investor:

Start date: 06/16/2011
$10,000

06/16/2011
$32,263

06/15/2021
End date: 06/15/2021
Start price/share: $25.25
End price/share: $67.17
Starting shares: 396.04
Ending shares: 480.39
Dividends reinvested/share: $7.63
Total return: 222.68%
Average annual return: 12.42%
Starting investment: $10,000.00
Ending investment: $32,263.72

The above analysis shows the ten year investment result worked out quite well, with an annualized rate of return of 12.42%. This would have turned a $10K investment made 10 years ago into $32,263.72 today (as of 06/15/2021). On a total return basis, that’s a result of 222.68% (something to think about: how might PNR shares perform over the next 10 years?). [These numbers were computed with the Dividend Channel DRIP Returns Calculator.]

Notice that Pentair PLC paid investors a total of $7.63/share in dividends over the 10 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 .8/share, we calculate that PNR has a current yield of approximately 1.19%. Another interesting datapoint we can examine is ‘yield on cost’ — in other words, we can express the current annualized dividend of .8 against the original $25.25/share purchase price. This works out to a yield on cost of 4.71%.

More investment wisdom to ponder:
“Cash combined with courage in a time of crisis is priceless.” — Warren Buffett