The definition in one line
A fund's AUM is its NAV per unit × the units outstanding. If the NAV is ₹50 and investors hold 20 crore units, AUM is ₹1,000 crore. It is the same number as the total market value of the fund's holdings, after liabilities.
Fund houses (AMCs) add up their schemes to report a house-level AUM, which is how the industry rankings in AMFI's data are built.
Two things move AUM
| Driver | Example on a ₹1,000 crore fund |
|---|---|
| Market gains or losses | Holdings rise 5%: ₹1,000 cr becomes ₹1,050 cr |
| Net flows (purchases − redemptions) | ₹100 cr more bought than sold: ₹1,050 cr becomes ₹1,150 cr |
So a fund's AUM can grow 15% in a period when its NAV grew only 5%. Rising AUM often means a rising market and fresh inflows, not skill. Falling AUM can be a fall in prices, redemptions, or both.
What size changes for you
- Cost. SEBI's expense limits fall as a scheme's AUM grows, so large funds can charge less. Whether a given fund actually does is on its page; compare expense ratios.
- Liquidity in smaller stocks. A very large small-cap fund may find it hard to buy or sell without moving prices. That is a reason managers close some funds to new money.
- Stability. A fund with very little AUM can be costly to run per unit and is more likely to be merged or wound up by its fund house.
Does bigger win?
Not on the evidence we have looked at. Our study of fund size and returns compares equity funds by size; size alone is a weak guide to choosing. Use AUM as a screen for problems (too tiny, or too big for the segment) rather than as a reason to buy.
Where to find it
A fund's AUM is on its page and in its factsheet, usually as a month-end figure. The screener lets you filter by minimum AUM.
This post is educational, not financial advice. The worked example is hypothetical and not a specific fund.
Frequently asked questions
What does AUM stand for?
Assets under management: the total market value of everything a fund, or a fund house, manages for investors.
Does a bigger fund mean a better fund?
No. Size shows how much money the fund holds, not how well it invests. Past a point it can make a small- or mid-cap fund harder to run.
Why does a fund's AUM change when I invest nothing?
Because AUM includes market gains and losses. If the stocks held rise 5%, the fund's AUM rises about 5% before any new money arrives.
This is commentary on published data, not investment advice. WealthTicker is not a SEBI-registered adviser or distributor. Figures are WealthTicker’s own calculations from public data — AMFI’s fund NAVs and disclosures, NSE’s index and FII/DII files, and the fund houses’ monthly portfolios (how we calculate). They are as of the dates stated and can be revised by their source.
Keep reading
Mutual fund stamp duty: 0.005% on purchases, in rupees
Since July 2020, buying fund units costs 0.005% stamp duty: ₹0.50 on a ₹10,000 SIP, ₹50 on ₹10 lakh. Where it shows up, and how it compares with the TER.
Direct vs regular calculator: price your fund's commission
Pick a scheme and the calculator fills in AMFI's two TERs. A worked example: Mirae Asset Large Cap's 0.94-point gap costs ₹11.88 lakh over 20 years.
Impact of 1% calculator: what one point of return costs
One point less return on a ₹20,000 monthly SIP for 25 years costs ₹61.41 lakh, 16.2% of the corpus. How the impact of 1% calculator works and how to read it.