Today's economy

The case for dollar-cost averaging

By Kevin Press,

Comments (1)

The case for dollar-cost averaging

There may be better ways to invest your retirement savings. But dollar-cost averaging is more than just an investment strategy.

I was pleased to see a comment at the end of last week’s blog post — Making saving simple– about the importance of automatic payroll deductions. Brian Poncelet, a financial advisor, wrote: “Dollar-cost averaging looks good on paper but does not work in the real world.”

Poncelet raises a worthwhile discussion point. Vanguard, the U.S. mutual fund company, published a study in July 2012 that highlighted an important flaw in the dollar-cost averaging strategy.

The study sought to answer a simple question: If you inherited $1 million, would you be better off investing it all at once or would your portfolio perform better if you were to invest the funds gradually over time (in other words, if you implemented a dollar-cost averaging strategy)?

Vanguard studied stock and bond returns in the U.S., U.K. and Australia. The research covered multiple stretches of time that featured widely varying market conditions, and investment holding periods ranging from one to 30 years. About two-thirds of the time, investors were better off with a lump-sum approach than they were a dollar-cost averaging strategy.

Does this mean dollar-cost averaging is a mistake?

It probably does, if you come into a large sum of money all at once, and you have a long enough time horizon before you need your money. This argument against dollar-cost averaging isn’t complicated. It merely (and correctly) identifies the likelihood that over time, your money will perform better if it is invested in the markets than it will if it is held in cash (either in a savings account or a low-interest earning cash instrument like a Guaranteed Investment Certificate). If someone hands you $1 million, it’s probably not in your best interest to invest $100,000 into a balanced portfolio and stuff the rest under your mattress to be invested piece by piece.

But for those of us not lucky enough to inherit a small fortune, dollar-cost averaging still makes sense. It helps make saving easier, and it prevents our trying to time the market. Save the same amount every month, and the price of your selected funds will dictate whether you buy a lot (when prices are low) or a little (when prices are high).

Dollar-cost averaging is as much a saving strategy as it is an investment strategy.
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Brian Poncelet,CFP on

Hello Kevin,

“Dollar-cost averaging is as much a saving strategy as it is an investment strategy”.

I will agree with that statement. As an aside, you can call me Brian Poncelet.

Another idea is to consider if one had a lump is to consider Person A vs Person B idea.

Assuming the goal in retirement is spend and enjoy the money. Person A (lets say has no life insurance)

Person B (has less cash but has cash value insurance).

Person B will have (assuming retiring at 65) will have at least 20% more money and better protection in retirement.) This works in all types of economic situations…unless Person A can get at least a 10% return or better every year.

Drop me a line if you want details.



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