Fund structure
How an ETF links a basket to a market price
An exchange-traded fund operates as an investment company holding a portfolio designed to mirror a benchmark index or implement an active discipline. The fund sponsor calculates official net asset value (NAV) per share at market close by totaling aggregate market value across holdings, subtracting liabilities, and dividing by total outstanding shares. However, because ETF shares trade continuously on electronic exchanges, market prices fluctuate throughout the day based on real-time order flow.
To maintain close alignment between secondary share prices and underlying asset values, the ETF ecosystem relies on an open-ended creation and redemption mechanism managed by authorized participants. When buying pushes an ETF's market price above NAV, an authorized participant purchases component securities in the primary market, delivers them to the custodian for newly created shares, and sells those shares on the exchange. This continuous arbitrage absorbs excess demand, closes premiums, and preserves market efficiency.
Underlying assets to ETF
- Fund custodian holds basket
- Daily NAV calculated
- Shares trade on exchange
- Arbitrage aligns pricing
Market price and net asset value are related but distinct financial metrics; they can diverge during periods of heightened market volatility.



