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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 Northrop Grumman Corp (NYSE: NOC)? Today, we examine the outcome of a ten year investment into the stock back in 2015.

Start date: 10/22/2015
$10,000

10/22/2015
  $39,065

10/21/2025
End date: 10/21/2025
Start price/share: $179.50
End price/share: $599.35
Starting shares: 55.71
Ending shares: 65.17
Dividends reinvested/share: $57.15
Total return: 290.62%
Average annual return: 14.59%
Starting investment: $10,000.00
Ending investment: $39,065.31

As shown above, the ten year investment result worked out quite well, with an annualized rate of return of 14.59%. This would have turned a $10K investment made 10 years ago into $39,065.31 today (as of 10/21/2025). On a total return basis, that’s a result of 290.62% (something to think about: how might NOC shares perform over the next 10 years?). [These numbers were computed with the Dividend Channel DRIP Returns Calculator.]

Notice that Northrop Grumman Corp paid investors a total of $57.15/share in dividends over the 10 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 9.24/share, we calculate that NOC has a current yield of approximately 1.54%. Another interesting datapoint we can examine is ‘yield on cost’ — in other words, we can express the current annualized dividend of 9.24 against the original $179.50/share purchase price. This works out to a yield on cost of 0.86%.

One more investment quote to leave you with:
“Nearly every time I strayed from the herd, I’ve made a lot of money. Wandering away from the action is the way to find the new action.” — Jim Rogers