How investing a fixed amount every month smooths out entry prices across market cycles.
The Simple Idea Behind It
Rupee cost averaging is less a strategy than a consequence. When you commit a fixed rupee amount at a fixed interval, that amount buys more units when the scheme’s Net Asset Value is low and fewer units when it is high. Nobody decides this; it falls out of the arithmetic. Over a long enough stretch, your average cost per unit settles below the average NAV across the same period.
Why It Matters Behaviourally
The mathematical benefit is real but modest. The behavioural benefit is larger. Investors who try to time their entry tend to invest heavily after good news and stop entirely after bad news — which is precisely backwards. A standing instruction removes the decision from the moment, and the moment is usually where the damage happens.
What It Does Not Do
It is worth being blunt about the limits. Averaging reduces timing risk; it does nothing about market risk. A Systematic Investment Plan in an equity scheme can show a negative return over one year, three years, or occasionally longer. The approach assumes you keep going through the uncomfortable stretch, and many people do not. It also assumes the underlying scheme category suits your horizon in the first place.
A Practical Note
Historical SIP return tables published by various sources show what would have happened to an investor who started on a particular date and never stopped. They are a description of the past, not an entitlement. Treat them as context, not as a forecast.
