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An on-chain index fund does not have one universal “price.” Its index level measures a basket under published rules; its net asset value (NAV) measures the fund’s actual assets after liabilities and expenses; and its token’s market price is what buyers and sellers trade it for. The figures can be related, but they are not interchangeable.
What does “price” mean for an on-chain index fund?
- Index level: A benchmark value calculated from constituent prices and index weights or units. It tracks the basket according to the index methodology; it is not necessarily the value of assets held by a particular fund.
- NAV per share or token: The fund’s net assets divided by its outstanding shares or tokens. It reflects holdings and accounting items such as cash, liabilities, accrued expenses, and pending fund flows, as applicable under the fund’s rules.
- Market price: The price at which the fund token trades on a venue. Trading supply and demand and available liquidity determine this price; it is distinct from the index calculation and NAV accounting.
Chainlink’s general explanation describes smart contracts retrieving asset prices, calculating gross portfolio value, subtracting programmed liabilities, and dividing by outstanding tokens. A fund’s actual implementation depends on its governing documents. Chainlink’s overview of tokenized funds explains the general pattern, while a fund filing can specify its own valuation and accounting rules.
How is an index level calculated?
For a basket whose constituent weights remain fixed between rebalances, one way to express the calculation is:
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Repair Windows errors before they cause bigger problemsFix Now →Scan for outdated or missing drivers - takes under a minuteDriver Scan →Clear out junk files and repair common Windows errorsFree Scan →Index value now = index value at last rebalance × Σ(weight at rebalance × current constituent price ÷ constituent price at rebalance)
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This calculates the weighted change in constituent prices since the last rebalance and applies it to the index’s previous level. Another equivalent approach assigns units to constituents and divides the basket’s current value by a divisor:
Index value = Σ(unitsᵢ × current priceᵢ) ÷ divisor
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Cryptex Finance publishes a methodology using Chainlink prices and this kind of weighted-return calculation. Its divisor is adjusted at rebalance to keep the index level continuous, so a change in how the basket is represented does not, by itself, cause a jump. This is Cryptex’s method, not a universal standard. Cryptex’s GTC index calculation describes its approach.
How is NAV per token calculated?
NAV is an accounting measure of the fund, not just the index formula. A simplified expression is:
NAV = value of holdings + cash and receivables − liabilities − accrued expenses
NAV per share or token = NAV ÷ outstanding shares or tokens
The exact items and valuation rules vary by fund. For example, a 2026 SEC filing for Grayscale Digital Large Cap Fund describes valuing component holdings using index prices, accounting for cash and pending creations or redemptions, subtracting expenses and accrued management fees, and reporting NAV and NAV per share. That filing is a fund-specific example, not a rule for every on-chain index fund. The Grayscale filing sets out its details.
Where do the constituent prices come from?
The index needs both a definition of the basket and prices for its assets. Index rules determine eligibility and weighting; a benchmark or oracle supplies prices. Providers may aggregate market data differently, so two indexes covering similar assets can still report different values.
| Example | Published pricing or index approach |
|---|---|
| Cryptex Finance | Its cited methodology uses Chainlink price feeds to calculate weighted constituent performance between rebalances. Cryptex methodology |
| Grayscale Digital Large Cap Fund | Its 2026 SEC filing describes a composite index price based on trading-platform prices, with input weighting designed to account for volume and price deviations. The filing says the algorithm calculates constituent trading-platform prices every five seconds over a 24-hour period. These are details of that fund’s methodology. SEC filing |
| Bitwise | Its general methodology says crypto indexes use Lukka Prime Intraday prices; the Bitwise 10 Large Cap Crypto Index section specifies the CME CF Cryptocurrency Reference Rate (New York Variant). Its methodology also describes free-float-adjusted market-cap weighting and treatment of forks, emissions, airdrops, and staking rewards. Bitwise index methodology |
| Kaiko Indices | Its ETF reference rates combine a volume-weighted median and a time-weighted average price, using time partitions, outlier-resistant medians, and greater weight for more recent partitions. Kaiko says the rates can be published on-chain and update every five seconds. Kaiko ETF reference rates |
These methodologies illustrate why an index label alone does not tell you how a displayed value was produced. Look for the source and aggregation method for prices, the valuation or update time, constituent and weighting rules, and how the fund accounts for fees, cash, and unusual asset events.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.What changes when the index rebalances?
A rebalance may change constituents, target weights, or the quantities assigned to each constituent. Under Cryptex’s described method, new units are calculated from target weights, the current index level, and prices at rebalance; the divisor is reset so the index level remains continuous. That adjustment maintains continuity in the index calculation, but it does not set the trading price of a fund token.
Schedules are product-specific. The 2026 Grayscale filing describes quarterly index and portfolio rebalancing periods. Bitwise’s general methodology says its indexes are ordinarily reconstituted monthly unless a specific index rule provides otherwise. Neither schedule should be assumed for an unrelated fund. Grayscale filing · Bitwise methodology
Do these 3 things before closing this tab:
1Clear out junk files and repair common Windows errors2Scan for outdated or missing drivers - takes under a minute3Repair Windows errors before they cause bigger problemsHow to assess a particular fund’s price calculation
- Identify the figure. Check whether the interface shows an index level, NAV per token, or a trading price from a venue.
- Find the price source. Read the fund or index methodology to learn which oracle or benchmark it uses and how prices are aggregated.
- Check basket rules. Look for constituent eligibility, weighting, and rules for forks, rewards, emissions, or other asset events.
- Check timing and rebalancing. Find the valuation timestamp or update cadence, rebalance schedule, and whether a divisor or other adjustment preserves index continuity.
- Read the NAV accounting rules. Confirm how holdings, cash, liabilities, fees, and pending creations or redemptions affect NAV, and how outstanding tokens are counted.
- Consult the fund’s governing documents. Provider examples explain those providers’ methods; only the specific fund’s documents establish its exact calculation.
A divisor adjustment can prevent a mechanical jump in an index level when its basket is reset. It does not establish that a traded fund token will always trade at NAV: index continuity, fund accounting, and venue trading are separate mechanisms.
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