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“When we own portions of outstanding businesses with outstanding managements, our favorite holding period is forever.”

— Warren Buffett

The Warren Buffett investment philosophy calls for a long-term investment horizon, where a two-decade 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 two-decade investment into the stock back in 1999.

Start date: 11/22/1999
$10,000

11/22/1999
$21,210

11/19/2019
End date: 11/19/2019
Start price/share: $134.50
End price/share: $285.43
Starting shares: 74.35
Ending shares: 74.35
Dividends reinvested/share: $0.00
Total return: 112.22%
Average annual return: 3.83%
Starting investment: $10,000.00
Ending investment: $21,210.29

As we can see, the two-decade investment result worked out as follows, with an annualized rate of return of 3.83%. This would have turned a $10K investment made 20 years ago into $21,210.29 today (as of 11/19/2019). On a total return basis, that’s a result of 112.22% (something to think about: how might BIIB shares perform over the next 20 years?). [These numbers were computed with the Dividend Channel DRIP Returns Calculator.]

One more investment quote to leave you with:
“The right time for a company to finance its growth is not when it needs capital, but rather when the market is most receptive to providing capital.” — Michael Milken