Source: https://mochatrade.com/learn/glossary/index-etf

# Index ETF
URL: https://mochatrade.com/learn/glossary/index-etf
Last modified: 2026-10-17

An index ETF holds every stock in a published index at the index weights, with no view and a small fee. It buys [in the closing auction on the day the index says](https://mochatrade.com/learn/us-market-structure/how-us-stock-prices-form), which makes it [the most predictable buyer in the market](https://mochatrade.com/learn/us-market-structure/who-moves-us-stocks), and [the days the index changes members](https://mochatrade.com/blog/mocha-markets-weekly-019) are forced buying with a published date.

## Related terms

- Closing auction (official close): https://mochatrade.com/learn/glossary/closing-auction
- Index rebalancing: https://mochatrade.com/learn/glossary/index-rebalancing
- US ETF: https://mochatrade.com/learn/glossary/us-etf
- Direct listing / SPAC: https://mochatrade.com/learn/glossary/direct-listing-spac
- SPY ETF: https://mochatrade.com/learn/glossary/spy-etf
- NASDAQ: https://mochatrade.com/learn/glossary/nasdaq