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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 Intuitive Surgical Inc (NASD: ISRG) 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: 05/29/2009
$10,000

05/29/2009
$94,464

05/28/2019
End date: 05/28/2019
Start price/share: $49.89
End price/share: $471.22
Starting shares: 200.44
Ending shares: 200.44
Dividends reinvested/share: $0.00
Total return: 844.52%
Average annual return: 25.17%
Starting investment: $10,000.00
Ending investment: $94,464.72

As shown above, the decade-long investment result worked out exceptionally well, with an annualized rate of return of 25.17%. This would have turned a $10K investment made 10 years ago into $94,464.72 today (as of 05/28/2019). On a total return basis, that’s a result of 844.52% (something to think about: how might ISRG shares perform over the next 10 years?). [These numbers were computed with the Dividend Channel DRIP Returns Calculator.]

One more piece of investment wisdom to leave you with:
“I make no attempt to forecast the market; my efforts are devoted to finding undervalued securities.” — Warren Buffett