The method by which a specific amount of money is invested in the same investment product on a regular basis in specific diversified timings is called "dollar cost averaging".

As the dollar cost averaging method invests the same amount of money regularly, the purchase unit price will level off.

 

In the defined contribution pension plan, time diversification is ensured by continuing to purchase the same investment product regularly with a fixed amount from contributions.

This is the method in which a small number of units are purchased when the net asset value per unit rises, and a large number of units are purchased when the net asset value per unit drops, resulting in levelling off the average purchase price.