Methodology & data sources
Where every number on BookMyMutualFund comes from, how often it updates, and how we calculate returns, risk and rankings.
1. What BookMyMutualFund is
We are a free research and comparison service. We do not sell mutual funds, take commissions or hold your money, and we do not give personalised investment advice. BookMyMutualFund is not registered with SEBI as an investment adviser or research analyst, and is not an AMFI-registered mutual fund distributor.
2. Which funds we cover
We list every active open-ended scheme in AMFI's daily NAV file: 1,802 schemes today. A scheme that drops out of that file, or has no NAV for 30 days, is treated as closed (matured, merged or wound up) and hidden from listings, search and rankings. Its page stays available, clearly marked as closed.
Rankings and category tables use direct growth plans, so funds are compared without distributor commissions or payouts affecting the figures.
3. Data sources and freshness
| Data | Source | How often | Latest |
|---|---|---|---|
| Latest NAV | AMFI daily NAV file (NAVAll.txt), covering every scheme | Every morning at about 7:30 IST | 1 Nov 2026 |
| NAV history | MFAPI (public historical NAVs, sourced from AMFI) | Imported once per fund back to its launch, then extended daily | From 3 Apr 2006 |
| Expense ratio (TER) | AMFI's daily Total Expense Ratio disclosures (the TER in force today) | Daily, a few fund houses per run; every fund within 2–3 days | 30 Oct 2026 |
| Fund size (AUM), riskometer, benchmark and benchmark returns | AMFI fund performance data | Daily at about 9:00 IST; AMFI publishes it 1–2 days after the NAV date | 29 Oct 2026 |
Coverage today: expense ratio for 1,722 and fund size for 1,686 of 1,802 active schemes; a few categories (for example some infrastructure debt funds) aren't in AMFI's fund performance data. Where we don't have a figure we show “—” rather than an estimate.
4. How returns are calculated
- 1-year return is the simple change in NAV over the last year.
- 3- and 5-year returns are annualised (CAGR): the yearly rate that takes the NAV on or just before the start date to the latest NAV. A 5-year figure appears only for funds with 5 years of history (875 schemes today).
- Since launchis annualised from the plan's first NAV. Direct plans only began in January 2013, so for older schemes it is measured from then; and AMFI's records start in April 2006, so nothing goes back further than that.
- Returns are after the fund's expenses, which NAVs already reflect, and before tax and any exit load. They are recalculated whenever a fund's NAV changes.
Our returns can differ slightly from AMFI's or a fund house's own figures because of the exact start date used and the day of the latest NAV.
5. How risk is measured
- Volatility is how much the NAV typically moves in a year: the annualised standard deviation of daily returns over the last 3 years.
- Worst fall is the largest drop from a peak NAV to a later low over the last 3 years.
- Riskometer is the official SEBI risk level (Low to Very High) that each fund house assigns, as published by AMFI.
6. Comparison with the benchmark
Each fund is compared with the benchmark index it declares (for example Nifty 500 TRI). For this comparison we use AMFI's published fund and benchmark returns, so both sides use the same date and method. “vs benchmark” is the fund's return minus the benchmark's, in percentage points.
7. How funds are ranked
- Category leaders (home page): active direct growth plans in each category, ranked by 3-year annualised return.
- Best fund lists (such as ELSS and category pages): ranked by 3-year annualised return, or 1-year return for funds younger than 3 years.
- Category averages are the simple average 3-year return of active schemes in the category.
These are mechanical rules applied to past data. There are no editorial picks, paid placements or sponsored rankings. A high rank says how a fund has done, not how it will do, and returns alone don't make a fund suitable for you.
8. Direct and regular plans
Every scheme has a direct plan, bought straight from the fund house, and a regular plan, bought through a distributor who is paid a commission from the fund's expenses. Both hold the same investments, but the regular plan's higher expense ratio means lower returns over time. We focus on direct plans.
9. What we don't show yet
Portfolio holdings, sector split, fund managers, exit load and minimum investment amounts are published in each scheme's monthly factsheet and Scheme Information Document (SID). We don't show them until we can keep them accurate; check the fund house's website for these.
10. Limitations
- Mutual fund investments are subject to market risks. Read all scheme-related documents carefully.
- Past performance does not guarantee future returns.
- Data can be delayed or occasionally wrong at the source. Confirm important figures with the fund house or your account statement before acting on them.
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