NAV (Net Asset Value) per unit is the single most misunderstood number in mutual fund investing — a fund with NAV of ₹10 is not "cheaper" or "better value" than a fund with NAV of ₹500, because NAV reflects the fund's accumulated history, not its future return potential, yet this misconception drives real investment decisions
The previous articles on this site covered SIP basics, SIP vs lump sum evidence, tax-efficient wrappers (ISA/Roth IRA/ELSS), step-up SIP compounding, and when to stop a SIP. This article addresses the NAV misconception and fund selection criteria — what actually determines whether a mutual fund is a good SIP vehicle, separating the irrelevant metrics from the metrics that genuinely predict future performance (with appropriate caveats about predictive limits).
Why NAV per unit is irrelevant to investment quality
Net Asset Value (NAV) is simply: total fund assets ÷ number of units outstanding. It's a price per unit, analogous to a stock's share price — and just as a stock's share price alone says nothing about whether it's a good investment, NAV alone says nothing about fund quality.
The common misconception: "Fund A has NAV ₹15, Fund B has NAV ₹450 — Fund A is cheaper, I can buy more units."
Why this is irrelevant: the number of units you own doesn't matter — only the total rupee value of your investment and its percentage growth matter. ₹10,000 invested in Fund A (NAV ₹15) buys 666.67 units. ₹10,000 invested in Fund B (NAV ₹450) buys 22.22 units. If both funds grow by 10% over a year:
- Fund A: NAV rises to ₹16.50, your 666.67 units are now worth ₹11,000
- Fund B: NAV rises to ₹495, your 22.22 units are now worth ₹11,000
Identical outcome. The NAV level is purely a function of the fund's launch date and historical performance accumulation — a fund launched in 2005 that's grown steadily has a higher NAV than an identical-performing fund launched in 2020, with no implication about future returns.
What NAV history reveals: fund age, not quality
A high NAV typically indicates an older fund that has compounded returns over a longer period — it reflects history, not future potential. A new fund offer (NFO) launches at NAV ₹10 regardless of the fund's actual investment quality.
The NFO marketing exploitation: some fund marketing historically leaned into the "NAV ₹10, get in early" framing — implying NFOs offer better value because of the low starting NAV. This is misleading: an NFO investing in the same stocks as an existing fund with NAV ₹100 will perform identically in percentage terms regardless of the NAV difference, because both are buying the same underlying assets at the same market price.
Where NAV history is genuinely informative: examining how NAV has moved over time (the NAV chart) shows the fund's historical volatility and drawdown pattern — useful for understanding risk characteristics, though past volatility doesn't guarantee future volatility patterns will be identical.
What actually predicts fund quality: the metrics that matter
Expense ratio: the annual fee charged as a percentage of assets under management. As covered in the compound interest fee drag article, even small differences compound significantly over long SIP horizons. Index funds typically charge 0.1-0.5%; actively managed funds typically charge 1-2.5% in India (Total Expense Ratio, TER).
Fund manager tenure and consistency: how long has the current fund manager been running this specific fund? A fund's historical 10-year track record is less informative if the current manager has only been in place for 18 months — the historical performance reflects a different decision-maker.
Portfolio concentration and overlap: how concentrated is the fund in a small number of stocks or sectors? High concentration increases both potential upside and downside volatility. For SIP investors seeking diversification, excessive concentration may not match the intended risk profile.
Benchmark-relative performance over multiple market cycles: comparing the fund's returns against its stated benchmark index across both bull and bear market periods reveals whether the fund manager's strategy adds value consistently or only in specific market conditions.
AUM (Assets Under Management) size and growth: very large AUM in small-cap or mid-cap funds can constrain the fund manager's ability to take meaningful positions in smaller companies without moving the market price — a fund that's grown too large for its stated mandate.
Direct vs regular plans: the distribution commission difference
Indian mutual funds offer two plan variants for the same underlying fund:
Regular plan: sold through a distributor/advisor/agent, who receives ongoing trail commission (typically 0.5-1% annually) from the fund's expense ratio.
Direct plan: purchased directly from the fund house (via their website, app, or platforms like Coin/Kuvera that specialize in direct plans), without distributor commission.
The expense ratio difference: a direct plan's TER is lower than the regular plan's TER by approximately the distributor commission amount — typically 0.5-1.5% lower depending on the fund category.
The compound impact over a SIP horizon: as the fee drag calculation in the previous compound interest article showed, a 1% annual fee difference compounds to a substantial gap over 20-30 years. For a self-directed investor comfortable choosing funds without advisor guidance, direct plans offer meaningfully better long-term returns purely from the lower fee structure — for identical underlying fund performance.
When regular plans still make sense: investors who genuinely benefit from advisor guidance (portfolio construction advice, behavioural coaching during market volatility, comprehensive financial planning) may find the advisor's value exceeds the additional cost — but this requires the advisor relationship to provide value beyond simple fund selection.
How to use the SIP Calculator on sadiqbd.com
- Model the direct vs regular plan difference: run identical SIP scenarios at two different assumed returns (e.g., 12% for direct plan, 11% for regular plan, reflecting a typical 1% TER difference) over your full investment horizon — the gap in final corpus illustrates the cumulative cost of the regular plan's distribution commission
- Ignore NAV entirely in your planning: the calculator's outputs depend only on contribution amount, assumed return rate, and tenure — NAV doesn't enter the calculation at all, reinforcing that it's irrelevant to your actual investment outcome
- Sensitivity test expense ratio assumptions: if comparing two specific funds with different expense ratios, adjust your assumed return rate by the expense ratio difference to model the realistic net impact on your SIP outcome
Frequently Asked Questions
If NAV doesn't matter, why do some funds appear to have "split" their NAV (like a stock split), and does that affect anything? Mutual fund NAV "splits" or "bonus unit" issuances occasionally occur and, like stock splits, don't change the investor's total value — only the number of units and the per-unit NAV. If a fund does a 1:5 bonus issue, an investor holding 100 units at NAV ₹500 (total value ₹50,000) would hold 500 units at NAV ₹100 (total value still ₹50,000). These corporate actions are occasionally used by fund houses for cosmetic reasons (making the NAV appear more "affordable" to attract new investors who mistakenly associate low NAV with better value, which connects back to the core misconception this article addresses) — they have zero effect on actual investment returns or value.
Is the SIP Calculator free? Yes — completely free, no sign-up required.
Try the SIP Calculator free at sadiqbd.com — calculate SIP returns, maturity amount, and wealth gained for any investment scenario.
