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Choose the index exposure first, then compare funds tracking that same index by current total expense ratio (TER), rolling tracking error and multi-year tracking difference over matching dates. A lower TER alone does not establish which fund tracked better, and the available information does not support naming one current best Nifty fund.
Start by choosing the index you actually want
An index mutual fund aims to replicate a specified index. Its goal is to follow the benchmark, not outperform it; expenses and the practical costs of managing the portfolio create a gap between fund and index returns. SEBI’s investor material on index mutual funds explains this approach.
Nifty 50 exposure is not the same as exposure to the entire Indian market. The index contains 50 stocks across 13 sectors. NSE reported that it represented about 53.73% of the free-float market capitalization of stocks listed on NSE as of March 30, 2026. Decide whether this large-company exposure suits your objective before comparing schemes. NSE’s Nifty 50 page provides the index description and figures.
Compare funds using both tracking measures
Tracking error and tracking difference answer different questions. Read them together, and compare funds only against the same benchmark—ideally its Total Returns Index (TRI), which includes dividends—using matching dates and horizons.
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Tracking error measures consistency
Tracking error is the standard deviation of periodic differences between a fund’s returns and its benchmark’s returns over a specified period. NSE describes its measure as an annualized standard deviation and says it is calculated against the TRI. A lower tracking error indicates that the fund’s deviations have been more consistent or less variable; it does not tell you the average size of the return gap or whether the fund outperformed on average. See SEBI’s definition and NSE’s methodology and explanation.
Tracking difference shows the realized return gap
Tracking difference is the annualized gap between a scheme’s return and the index return over a stated horizon. It shows the realized shortfall or, where applicable, outperformance for that period. Compare one-, three- and five-year figures, as well as since-inception data where available, rather than relying on a single short interval.
AMFI’s tracking-data page lets you select a mutual fund and date to look up tracking error and tracking difference. Disclosure frequency and presentation can vary by scheme; use the latest AMC and AMFI data and make sure the dates and horizons align before comparing.
Understand what drives the gap
TER matters, but it is not the only source of tracking mismatch. NSE lists expenses, transaction costs, cash balances, investor flows, corporate actions and changes to index constituents among the factors that can affect tracking. Realized tracking difference helps show the combined effect of these factors over time, while current TER indicates a recurring scheme expense to check now.
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Outbyte Driver Updater FREEFix the driver behind crashes, sound loss and screen glitchesFind Drivers →Outbyte PC Repair FREERepair Windows errors before they cause bigger problemsFix Now →Do not mistake an index-market statistic for a fund cost. For example, NSE’s reported 0.02% impact cost for a portfolio size of Rs. 50 lakhs in March 2026 describes index market data, not a mutual fund’s expense ratio or the typical trading cost an individual investor will face.
Check the exact plan and current TER
Direct and regular plans of the same scheme hold the same portfolio and are managed by the same fund manager, but have different expense ratios. A direct plan excludes distributor or agent costs and has a lower expense ratio; choosing it also means you take responsibility for selecting the scheme and handling the investment. AMFI explains the distinction in its Direct Plan guidance.
Confirm whether each TER you compare belongs to a direct or regular plan, and verify the latest figure in the scheme’s current disclosure. A Franklin India NSE Nifty 50 Index Fund factsheet accessed October 7, 2026, listed base expense ratios of 0.55% for the scheme and 0.24% for its direct variant, plus a three-year tracking error of 0.13%. The factsheet specified that its base expense ratio excluded brokerage, transaction costs and statutory levies charged at actuals. These dated, scheme-specific figures illustrate why labels and dates matter; they are not total investment costs or a recommendation.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Use a like-for-like comparison
- Match the index. Compare funds that track the same index, and check that performance measures use the corresponding TRI benchmark.
- Align dates and horizons. Compare tracking error and tracking difference for the same dates and periods. Review rolling tracking error and, where disclosed, one-, three- and five-year and since-inception tracking difference.
- Identify the plan. Confirm whether each scheme figure is for the direct or regular plan rather than comparing unlike variants.
- Check current TER. Verify the latest expense ratio in the AMC’s disclosure; do not treat an older factsheet figure as current.
- Consider how you will invest. Choose a direct plan if you are comfortable making and managing the investment decisions, or consider appropriate guidance if you need help.
For ETFs, assess execution and liquidity separately from the index-tracking measures. The figures and disclosures cited here do not establish current, fund-by-fund ETF liquidity or premium/discount comparisons.
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