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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 Warren Buffett investment philosophy calls for a long-term investment horizon, where a ten year holding period, or even longer, would fit right into the strategy. How would such a strategy have worked out for an investment into Biogen Inc (NASD: BIIB)? Today, we examine the outcome of a ten year investment into the stock back in 2013.

Start date: 04/08/2013
$10,000

04/08/2013
  $14,631

04/05/2023
End date: 04/05/2023
Start price/share: $194.13
End price/share: $283.99
Starting shares: 51.51
Ending shares: 51.51
Dividends reinvested/share: $0.00
Total return: 46.29%
Average annual return: 3.88%
Starting investment: $10,000.00
Ending investment: $14,631.00

As shown above, the ten year investment result worked out as follows, with an annualized rate of return of 3.88%. This would have turned a $10K investment made 10 years ago into $14,631.00 today (as of 04/05/2023). On a total return basis, that’s a result of 46.29% (something to think about: how might BIIB 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:
“Finding the best person or the best organization to invest your money is one of the most important financial decisions you’ll ever make.” — Bill Gross