"Is Dollar-Cost Averaging Really Effective?"

Is dollar-cost averaging really an effective way to invest?

Domestic asset management companies and securities firms actively recommend dollar-cost averaging (DCA) fund investing.
The reason is that a DCA strategy, investing a fixed amount every month, can boost investment returns over the long term.
However, according to the empirical analysis in a recent academic paper, the DCA strategy actually showed weaker performance than other investment approaches.
Particularly noteworthy are the findings on the 'average purchase price reduction effect' of the DCA strategy.
Supporters of the DCA strategy generally argue that because the average purchase price falls as share prices fluctuate, this leads to higher returns.

However, the paper points out that the effect of the DCA strategy is correct only mathematically and has no economic meaning.
This is because the average purchase price of the DCA strategy represents the cost of a feasible investment, whereas the historical average price represents the cost of an infeasible investment.

To put it simply, the historical average share price means the average price assuming you buy the same number of shares every month.
In contrast, the DCA strategy invests the same amount of money every month, so the number of shares purchased varies with share price movements
The paper's key point, therefore, is that the historical average share price and the average purchase price of the DCA strategy are different concepts.
In particular, the longer a fund's lifespan, the more the lump-sum strategy outperformed the DCA strategy.

To explain the paper in more detail, it used domestic fund data from June 1998 to July 2009 provided by Zeroin Inc.
Out of a total of 45,716 funds, 6,821 funds suitable for the DCA strategy were selected, and of these, 5,337 funds sold directly to consumers were used as the final sample.

The researchers compared and analyzed the returns and risks of the Lump Sum (LS) strategy, the DCA strategy, and the half-and-half (Buy-and-Hold, BH) strategy using a variety of methodologies.
- Lump Sum (LS) strategy: investing the entire amount in risky assets all at once at the start of the investment
- Half-and-half (BH) strategy : investing 50% each in risky and risk-free assets at the start of the investment
As a result, the Lump Sum (LS) strategy showed both higher returns and higher risk than the DCA strategy.
In addition, the half-and-half (BH) strategy had the same expected return as the DCA strategy but lower risk, and was therefore found to dominate the DCA strategy.
Moreover, the longer a fund's lifespan, the more the Lump Sum (LS) strategy outperformed the DCA strategy.
This shows that the longer a fund has existed and the more market conditions it has experienced, the clearer the performance gap between investment strategies becomes.

Ultimately, this study shows that, contrary to conventional wisdom, the DCA strategy may actually be disadvantageous in terms of returns and risk management.
This runs counter to the marketing of asset managers and securities firms, the opinions of financial experts, and the beliefs of ordinary investors.

Therefore, when making investment decisions, it is necessary to carefully review the pros and cons of the DCA strategy.
From a financial company's perspective, DCA funds and stock-accumulation services are excellent products that keep customers for long periods without separate marketing costs.
So one might wonder whether they are actually the optimal financial product for financial companies rather than for customers
It seems important to choose the optimal strategy that fits your own investment style and goals.

This has been maruLab.