The short answer
Two funds can share a category, benchmark and several top stocks—and still be different investments.
Every return passes through three layers. The market supplies the opportunity set. The fund manager or index process converts it into a portfolio. The investor then adds deposits, withdrawals and behaviour. A difference at any layer can change the result.
This is why “both are flexi-cap funds” or “both track the Nifty 50” is a starting point, not an investment conclusion.
Fund holdings and performance are dated snapshots, not recommendations. The HDFC, PPFAS and Motilal Oswal figures below are from official disclosures as at 31 July 2026. Returns can change after that date; compare current documents before acting.
01 · Three return layers
The market return, fund return and investor return are not the same number.
Market return
What the relevant shares, bonds or index delivered before a specific fund’s choices and costs.
Fund return
What the NAV delivered after weights, cash, expenses, trading and portfolio decisions.
Investor return
What the individual earned after the timing and size of every purchase, redemption and distribution.
A rising market can coexist with a weak fund if the portfolio is positioned differently. A strong fund return can coexist with a poor investor return if money arrived after a rally and left during a fall. Performance analysis fails when these layers are collapsed into one chart.
02 · One category, two portfolios
HDFC Flexi Cap and Parag Parikh Flexi Cap show how much a category label can conceal.
Both schemes sit in India’s flexi-cap category and use the Nifty 500 TRI as their primary benchmark. Their July 2026 portfolios, however, were built to express different choices.
| 31 July 2026 snapshot | HDFC Flexi Cap | Parag Parikh Flexi Cap | Why it matters |
|---|---|---|---|
| Domestic equity core | 94.25% listed equity | 70.11% core Indian equity | Different participation in an India-only equity rally |
| Other equity-linked sleeves | 2.17% REITs | 2.11% arbitrage/special situations; 4.08% REITs/InvITs | Different return drivers and volatility |
| Overseas securities | Nil disclosed in the portfolio table | 11.07% | PPFAS adds US equity and currency exposure |
| Debt and liquidity sleeve | 0.46% government securities; 3.12% cash/current assets | 12.63% debt and money-market instruments | Changes upside capture and downside flexibility |
| Largest bank weights | ICICI 9.21%; HDFC 6.11%; Axis 6.01%; SBI 4.14% | HDFC 7.55%; ICICI 5.56%; Kotak 4.07%; Axis 2.79% | The same banking move reaches NAV with different force |
| Market-cap mix | 70.94% large; 14.42% mid; 11.00% small | No directly comparable table in the cited factsheet | Do not manufacture a matched statistic when disclosure formats differ |
| Direct-plan base expense ratio | 0.65% | 0.52% | Cost affects NAV every year, but does not describe the strategy |
HDFC and PPFAS official factsheets. Percentages are of net assets and may not be directly additive across disclosure buckets. “Nil disclosed” means no overseas holding appears in the cited HDFC portfolio table; it is not a permanent mandate statement.
Suppose ICICI Bank rises 20% while everything else is unchanged. A 9.21% weight contributes roughly 1.84 percentage points before costs; a 5.56% weight contributes about 1.11 points. Same company, same price move, approximately 0.73 percentage point difference from that holding alone.
Portfolio overlap tells you whether the funds own the same names. Weight overlap tells you whether those names can produce the same result.
03 · Where active-fund differences come from
Most return gaps can be traced to a small set of portfolio decisions.
- 01Position size
A 10% holding has five times the portfolio effect of a 2% holding. Top-ten names alone do not reveal conviction.
- 02Market-cap exposure
A fund with more mid- and small-cap exposure may lead when market breadth is strong and lag more sharply when liquidity retreats.
- 03Sector and factor mix
Banking, technology, defensives, value, quality and momentum can rotate leadership. A fund may look diversified by stock count yet be concentrated in one economic driver.
- 04Cash and non-equity assets
Cash can cushion a decline and preserve optionality. In a fast rally, the same cash becomes a drag. The result depends on the path, not the label “defensive”.
- 05Turnover and trading
Frequent repositioning can add value or consume it through market impact, brokerage and taxes inside the scheme. AUM matters when trades are large relative to market liquidity.
- 06Investment style
A value manager can trail while expensive growth stocks re-rate. A quality manager can lag a speculative rebound. The real question is whether the process was followed and whether the cycle—not the skill—explains the result.
This is also why one-year rankings are unstable. A short window may reward a temporary factor exposure. Rolling periods, drawdowns and portfolio history help separate a repeatable process from a fortunate calendar.
04 · Same index, different implementation
Passive funds remove stock selection. They do not remove execution.
Motilal Oswal Nifty 50 Index Fund seeks to replicate the Nifty 50 TRI. Its official page nevertheless showed small return gaps to the benchmark at 31 July 2026.
| Period | Direct-plan return | Nifty 50 TRI | Fund minus index |
|---|---|---|---|
| 1 year | −0.55% | −0.43% | −0.12 percentage point |
| 3 years CAGR | 8.39% | 8.57% | −0.18 percentage point |
| 5 years CAGR | 10.18% | 10.41% | −0.23 percentage point |
Official Motilal Oswal AMC data, Direct Growth and Nifty 50 TRI, 31 July 2026. Rounded to two decimals; past performance is not a forecast.
Expenses are a predictable source of drag, but not the only one. Cash held for flows, index rebalancing, corporate actions, trading costs, securities lending and sampling can all affect replication. For an index fund, compare realised tracking difference and tracking error alongside TER.
05 · Small gaps, long horizons
A 0.75 percentage-point annual gap becomes ₹11.62 lakh on ₹10 lakh over 20 years.
Assume two illustrative portfolios have identical risk and no cash flows after the initial investment. One compounds at 11.75% a year; the other at 11.00%.
| Illustrative investment | Annual return | Value after 20 years |
|---|---|---|
| Portfolio A | 11.75% | ₹92.25 lakh |
| Portfolio B | 11.00% | ₹80.62 lakh |
| Difference | 0.75 percentage point | ₹11.62 lakh |
₹10,00,000 × (1 + return)20. The example isolates compounding; it ignores taxes, loads and intervening cash flows.
The lesson is not that the lower-cost fund always wins. In an active fund, differentiated decisions may offset higher cost—or fail to. The lesson is that a recurring gap needs an economic explanation. “Only 0.75%” is not a serious answer over two decades.
06 · Capacity, liquidity and asset class
The same framework changes when the underlying assets change.
In equity funds, size can narrow the set of positions large enough to matter, particularly in smaller companies. A large fund can also benefit from lower expense ratios, research scale and access. AUM is therefore a constraint to analyse, not a verdict.
Debt funds require another lens. Two short-duration funds can differ in credit quality, issuer concentration, yield-to-maturity, modified duration and the ease with which bonds can be sold. Hybrid funds add the manager’s allocation rule, hedging and rebalance timing. The category boundary does not equalise those risks.
Use the same basic question across all three: what economic exposure dominates NAV when the market becomes difficult?
07 · The behaviour gap
A good fund can still become a poor personal investment.
Imagine a fund’s NAV moves from ₹100 to ₹130, falls to ₹95 and later reaches ₹150. Its published point-to-point return depends only on the selected dates. The investor’s outcome depends on where the money arrived.
| Investor action | What it changes | Useful measure |
|---|---|---|
| ₹1 lakh invested at ₹100 and held | Captures the full NAV path to ₹150 | CAGR or absolute return |
| Most money added after NAV reaches ₹130 | More capital experiences the subsequent fall | XIRR |
| Units redeemed near ₹95 | Converts a temporary drawdown into a realised loss | Actual cash-flow return |
| SIP continued through the decline | Buys more units at lower NAV, without guaranteeing profit | XIRR and units accumulated |
SIP is a contribution method, not a quality certificate. It can reduce timing concentration and support discipline, but it cannot repair an unsuitable category, a broken process or a near-term liquidity mismatch.
08 · A comparison that survives scrutiny
Use this order before choosing between similar mutual funds.
- 01Match the mandate and benchmark
Compare like with like: the same category, benchmark type and reasonable opportunity set.
- 02Match plan, option and dates
Direct versus regular and Growth versus IDCW can produce different displayed results. Use the version you will actually own.
- 03Compare weights, not just names
Measure top holdings, sector and market-cap mix, cash, overseas assets and meaningful portfolio overlap.
- 04Inspect the return path
Use rolling returns, drawdown, recovery and downside periods rather than one trailing rank.
- 05Attribute the gap
Estimate how much came from allocation, selection, cash, cost and implementation. If the source is unknowable, confidence should fall.
- 06Check capacity and continuity
Review AUM, turnover, underlying liquidity, manager tenure and whether the process survived different markets.
- 07Model your behaviour
Would you keep investing after a 25% fall? Does the goal date allow recovery time? Fund quality cannot rescue forced selling.
- 08Write the reason before buying
State what the fund adds, what would disprove the choice and which existing holding it may duplicate.
Use the Mutual Fund Comparison for matched performance, the Portfolio Overlap Tool for shared holdings and the Rolling Returns & Drawdown Tool for path risk.
The decision rule
Compare the return engine before you compare the return.
Fund categories make a large market searchable. They do not make schemes interchangeable. Similar holdings can carry different weights; the same index can be implemented with different friction; the same fund can create different outcomes for two investors.
Do not ask only, “Which fund returned more?” Ask, “What produced the difference—and am I willing to own that exposure when it works in reverse?”Frequently asked questions
Why similar mutual funds give different returns
Why do mutual funds in the same category give different returns?
A category defines broad boundaries, not an identical portfolio. Funds can differ in stock weights, market-cap exposure, sectors, cash, investment style, turnover, expenses and trading. Those differences change both return and risk.
Can two mutual funds own the same stocks and still perform differently?
Yes. If one fund puts 9% in a stock and another puts 4%, the same price move has more than twice the effect on the first portfolio. What a fund owns matters; how much it owns matters just as much.
Do all Nifty 50 index funds give the same return?
No. They track the same index but incur expenses and implementation frictions. Cash, rebalancing, corporate actions, trading and sampling can create a tracking difference. Tracking error measures how consistently that difference varies.
What is the difference between fund return and investor return?
Fund return measures NAV movement between two dates. Investor return depends on the investor’s actual deposits, withdrawals and timing. A SIP, lump sum and panic redemption can therefore produce different XIRRs in the same scheme.
Is the cheapest mutual fund always the best?
No. Cost is important because it compounds, but active funds must also be judged on process, portfolio, benchmark, capacity and risk. For index funds, low cost is helpful, yet realised tracking difference is the more complete implementation result.
How should Indian investors compare similar mutual funds?
Match the same category, benchmark, plan and dates. Then compare portfolio weights, market-cap and sector mix, concentration, cash, turnover, TER, tracking, rolling returns, drawdowns and fund-manager process. Finally test whether the fund fits the investor’s goal and behaviour.
Sources and methodology
What this mutual-fund comparison rests on
Official AMC factsheets establish dated portfolios, expenses and performance. SEBI material establishes the tracking-error concept. AssetsNest calculations are labelled illustrative and rounded. Reviewed 18 August 2026.
HDFC Mutual Fund — July 2026 factsheetHDFC Flexi Cap allocation, holdings, market-cap mix, expense ratio and dated portfolio dataOpen ↗PPFAS Mutual Fund — July 2026 digital factsheetParag Parikh Flexi Cap allocation, holdings, overseas exposure, turnover and expense ratioOpen ↗Motilal Oswal AMC — Nifty 50 Index FundDirect-plan and Nifty 50 TRI returns to 31 July 2026Open ↗SEBI Investor — understanding tracking errorDefinition of tracking error as the variability of portfolio return relative to its benchmarkOpen ↗SEBI Investor — index mutual fundsHow index funds replicate a benchmark and why expenses or operations create differencesOpen ↗AssetsNest research methodologyHow facts, calculations, inference and editorial judgement are separatedRead →AssetsNest is based in Lucknow, Uttar Pradesh, but SEBI categories, AMC factsheets and scheme NAVs operate nationally. Investors in Lucknow use the same comparison framework as investors elsewhere in India. Local value comes from clearer education and accessible service—not from pretending the fund mathematics changes by city.
AssetsNest Investor Services — ARN 318691. This article is educational and informational only. It is not personalised investment, legal or tax advice, an offer, solicitation or recommendation. Mutual funds involve market risk, including possible loss of capital. Portfolio, expenses, manager, rules and performance can change; verify current scheme documents and suitability before investing.