Authorized Participants

An authorized participant (AP) is a financial institution contractually permitted to create or redeem large blocks of ETF shares directly with the fund. APs are typically large broker-dealers and transact in blocks called creation units rather than individual retail shares.

An AP is not automatically the ETF’s market maker, and it is not required to eliminate every premium, discount, or bid-ask spread.

Key Takeaways

• Retail investors trade ETF shares on an exchange; APs interact directly with the fund in creation units.
• Creations add ETF shares in exchange for a specified basket of securities, other assets, or cash.
• Redemptions return ETF shares to the fund in exchange for a basket or cash.
• The mechanism gives market participants a way to respond to price differences between ETF shares and portfolio value.
• Transaction costs, funding, risk limits, market closures, and illiquid assets can reduce or delay arbitrage.

Primary and Secondary Markets

Most ETF investors never transact with the fund. Their liquidity comes first from other buyers, sellers, and market makers in the secondary market.

Creation Process

A typical in-kind creation works as follows:

1. The ETF publishes or communicates the required creation basket.
2. The AP acquires the specified securities and cash component.
3. The AP delivers the basket to the ETF or its agent.
4. The ETF issues a creation unit to the AP.
5. The AP can hold the shares, sell them, or transfer them to another market participant.

Some funds use cash creations or a combination of cash and securities.

Redemption Process

For a redemption, the AP assembles the required number of ETF shares and delivers the creation unit to the fund. The fund returns the designated securities, assets, or cash.

In-kind transfers can reduce the need for the fund to buy or sell portfolio securities for every shareholder flow. The tax and transaction-cost effects depend on the fund, basket, assets, and applicable law.

Worked Example: Why Creation Can Narrow a Premium

Assume an ETF’s portfolio value is approximately $50 per share while ETF shares trade at $50.30. A creation unit contains 50,000 shares.

The apparent gross price difference is:

50,000 x ($50.30 - $50.00) = $15,000

An AP or other market participant might seek to acquire the basket, create ETF shares, and sell those shares. Additional supply can put downward pressure on the ETF price.

The $15,000 is not guaranteed profit. Basket trading costs, bid-ask spreads, fees, hedging, financing, taxes, execution risk, and changes in prices can consume or reverse the difference.

AP vs. Market Maker

One institution may perform more than one role, but the terms are not interchangeable.

When the Mechanism Is Less Effective

Premiums, discounts, or wide spreads can persist when:

• underlying markets are closed
• portfolio assets are illiquid or difficult to value
• creation baskets are expensive to trade
• volatility raises hedging and financing costs
• APs or market makers reduce risk capacity
• operational or settlement systems are disrupted
• the ETF has few active AP relationships

The existence of an AP agreement does not guarantee active creations, redemptions, tight spreads, or a market price equal to NAV.

How to Evaluate AP and ETF Liquidity

• Review the ETF’s bid-ask spread and trading depth.
• Examine premiums and discounts during normal and stressed markets.
• Distinguish secondary-market volume from underlying-asset liquidity.
• Check the creation-unit size and whether baskets are in-kind, cash, or mixed.
• Review disclosed AP concentration and operational dependencies when available.
• Consider whether the underlying market is open when trading the ETF.

This page is general financial education, not trading or investment advice. Creation-redemption mechanics reduce some pricing frictions but do not eliminate market, liquidity, or execution risk.

Official Resources

• Investor.gov: Authorized Participants defines APs and creation units.
• Investor.gov: ETF Investor Bulletin explains ETF primary- and secondary-market transactions.
• Investor.gov: Exchange-Traded Funds explains market prices, NAV, and ETF risks.

Related Terms

• Exchange-Traded Fund: Fund whose shares APs create and redeem in large blocks.
• Indicative Net Asset Value: Intraday reference estimate that is distinct from an executable quote.
• Arbitrage: Trading intended to capture price differences among related assets.
• Market Maker: Firm quoting and trading shares in the secondary market.
• Liquidity: Ability to execute without materially moving price.