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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 decade-long holding period. Suppose such a “buy-and-hold” investor had looked into buying shares of DTE Energy Co (NYSE: DTE) back in 2010. Let’s take a look at how such an investment would have worked out for that buy-and-hold investor:

Start date: 10/26/2010


End date: 10/23/2020
Start price/share: $47.05
End price/share: $125.15
Starting shares: 212.54
Ending shares: 306.62
Dividends reinvested/share: $30.31
Total return: 283.74%
Average annual return: 14.39%
Starting investment: $10,000.00
Ending investment: $38,360.18

The above analysis shows the decade-long investment result worked out quite well, with an annualized rate of return of 14.39%. This would have turned a $10K investment made 10 years ago into $38,360.18 today (as of 10/23/2020). On a total return basis, that’s a result of 283.74% (something to think about: how might DTE shares perform over the next 10 years?). [These numbers were computed with the Dividend Channel DRIP Returns Calculator.]

Notice that DTE Energy Co paid investors a total of $30.31/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 4.05/share, we calculate that DTE has a current yield of approximately 3.24%. Another interesting datapoint we can examine is ‘yield on cost’ — in other words, we can express the current annualized dividend of 4.05 against the original $47.05/share purchase price. This works out to a yield on cost of 6.89%.

One more investment quote to leave you with:
“In trading you have to be defensive and aggressive at the same time. If you are not aggressive, you are not going to make money, and if you are not defensive, you are not going to keep money.” — Ray Dalio