Types of Dollar Cost Averaging

There are four primary categories of Dollar Cost Averaging, organized by the timing and frequency of investments: Fixed Interval, Fixed Amount, Value Averaging, and Constant Dollar Plan, each with distinct characteristics and applications.

Main Categories

• Fixed Interval — investing a fixed amount of money at regular intervals, regardless of the market's performance, as seen in the Vanguard 500 Index Fund, which allows investors to invest a fixed amount of money at regular intervals.
• Fixed Amount — investing a fixed amount of money at irregular intervals, depending on the market's performance, as practiced by Warren Buffett, who has invested fixed amounts of money in the stock market at irregular intervals, taking advantage of market downturns.
• Value Averaging — investing a variable amount of money at fixed intervals, with the goal of achieving a target portfolio value, as implemented by Fidelity Investments, which offers a value averaging investment option to its clients.
• Constant Dollar Plan — investing a fixed amount of money at fixed intervals, with the goal of maintaining a constant dollar value of the investment portfolio, as used by T. Rowe Price, which offers a constant dollar plan investment option to its clients.

Comparison Table

How They Relate

The categories of Dollar Cost Averaging often overlap, with Fixed Interval and Value Averaging being commonly confused, as both involve investing at fixed intervals, but with different investment amounts. Fixed Amount and Constant Dollar Plan are also related, as both involve investing a fixed amount of money, but with different investment frequencies. For example, an investor using a Fixed Interval strategy may also use a Constant Dollar Plan to maintain a constant dollar value of their investment portfolio. Similarly, an investor using a Value Averaging strategy may also use a Fixed Amount strategy to invest a fixed amount of money at irregular intervals. The Dow Jones Industrial Average is often used as a benchmark for Dollar Cost Averaging strategies, with Charles Dow's portfolio management principles, which emphasize the importance of regular investments, still influencing investment decisions today. Ricardo's comparative advantage model (1817) also supports the idea of Dollar Cost Averaging, as it suggests that investors should focus on investing in assets with a comparative advantage, rather than trying to time the market.