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“I buy on the assumption that they could close the market the next day and not reopen it for five 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 five year holding period possibly?

Suppose a “buy-and-hold” investor was considering an investment into Northrop Grumman Corp (NYSE: NOC) back in 2020: back then, such an investor may have been pondering this very same question. Had they answered “yes” to a full five year investment time horizon and then actually held for these past 5 years, here’s how that investment would have turned out.

Start date: 03/20/2020
$10,000

03/20/2020
  $18,711

03/19/2025
End date: 03/19/2025
Start price/share: $284.02
End price/share: $491.52
Starting shares: 35.21
Ending shares: 38.08
Dividends reinvested/share: $33.15
Total return: 87.15%
Average annual return: 13.35%
Starting investment: $10,000.00
Ending investment: $18,711.46

As shown above, the five year investment result worked out quite well, with an annualized rate of return of 13.35%. This would have turned a $10K investment made 5 years ago into $18,711.46 today (as of 03/19/2025). On a total return basis, that’s a result of 87.15% (something to think about: how might NOC shares perform over the next 5 years?). [These numbers were computed with the Dividend Channel DRIP Returns Calculator.]

Notice that Northrop Grumman Corp paid investors a total of $33.15/share in dividends over the 5 holding period, marking a second component of the total return beyond share price change alone. Much like watering a tree, reinvesting dividends can help an investment to grow over time — for the above calculations we assume dividend reinvestment (and for this exercise the closing price on ex-date is used for the reinvestment of a given dividend).

Based upon the most recent annualized dividend rate of 8.24/share, we calculate that NOC has a current yield of approximately 1.68%. Another interesting datapoint we can examine is ‘yield on cost’ — in other words, we can express the current annualized dividend of 8.24 against the original $284.02/share purchase price. This works out to a yield on cost of 0.59%.

Another great investment quote to think about:
“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