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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 above quote from Warren Buffett is timeless, and brings into focus the choice about time horizon that any investor should think about before buying a stock they are considering. Behind every stock is an actual business; what will that business look like over a decade-long period?

Today, let’s look backwards in time to 2009, and take a look at what happened to investors who asked that very question about Biogen Inc (NASD: BIIB), by taking a look at the investment outcome over a decade-long holding period.

Start date: 05/08/2009


End date: 05/07/2019
Start price/share: $48.60
End price/share: $229.02
Starting shares: 205.76
Ending shares: 205.76
Dividends reinvested/share: $0.00
Total return: 371.23%
Average annual return: 16.76%
Starting investment: $10,000.00
Ending investment: $47,111.32

The above analysis shows the decade-long investment result worked out exceptionally well, with an annualized rate of return of 16.76%. This would have turned a $10K investment made 10 years ago into $47,111.32 today (as of 05/07/2019). On a total return basis, that’s a result of 371.23% (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.]

More investment wisdom to ponder:
“Markets are constantly in a state of uncertainty and flux and money is made by discounting the obvious and betting on the unexpected.” — George Soros