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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

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 decade-long holding period possibly?

Suppose a “buy-and-hold” investor was considering an investment into SL Green Realty Corp (NYSE: SLG) back in 2009: back then, such an investor may have been pondering this very same question. Had they answered “yes” to a full decade-long investment time horizon and then actually held for these past 10 years, here’s how that investment would have turned out.

Start date: 03/19/2009
$10,000

03/19/2009
$90,903

03/18/2019
End date: 03/18/2019
Start price/share: $12.32
End price/share: $89.93
Starting shares: 811.69
Ending shares: 1,010.97
Dividends reinvested/share: $18.18
Total return: 809.16%
Average annual return: 24.69%
Starting investment: $10,000.00
Ending investment: $90,903.12

The above analysis shows the decade-long investment result worked out exceptionally well, with an annualized rate of return of 24.69%. This would have turned a $10K investment made 10 years ago into $90,903.12 today (as of 03/18/2019). On a total return basis, that’s a result of 809.16% (something to think about: how might SLG 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 SL Green Realty Corp has paid $18.18/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 3.4/share, we calculate that SLG has a current yield of approximately 3.78%. Another interesting datapoint we can examine is ‘yield on cost’ — in other words, we can express the current annualized dividend of 3.4 against the original $12.32/share purchase price. This works out to a yield on cost of 30.68%.

One more piece of investment wisdom to leave you with:
“As time goes on, I get more and more convinced that the right method of investment is to put fairly large sums into enterprises which one thinks one knows something about and in the management of which one thoroughly believes.” — John Maynard Keynes