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ETF Education

How ETFs are Created and Redeemed

ETFs benefit from a unique process called creation/redemption. In essence creation involves the buying of all the underlying securities and wrapping them into the exchange traded fund structure. Whereas, redemption is the process whereby the ETF is ‘unwrapped’ back into the individual securities.

ETF Creation/Redemption Process

The ETF creation and redemption process takes place in the primary market between the ETF issuer and authorised participants (APs). APs are entities chosen by an ETF issuer to undertake the responsibility of obtaining the underlying assets needed to create an ETF. Authorised participants can be large institutional organisations or market makers.


Authorised participants create ETF shares in large increments—known as creation units—by assembling the underlying securities of the fund in their appropriate weightings to reach creation unit size. The AP then delivers those securities to the ETF issuer (like us at SPDR ETFs).

In return, the ETF issuer bundles the securities into the ETF wrapper, and delivers the ETF shares to the AP. These newly created ETF shares are then introduced to the secondary market, where they are traded between buyers and sellers through the exchange.

When demand increases, more ETF shares can be created using this process. In effect, this allows the liquidity of an ETF’s underlying securities to enhance the liquidity of the ETF itself.


APs can also redeem ETF shares by reversing this process. Large increments of ETF shares—known as redemption units—are collected in the secondary market and then delivered to the ETF issuer in exchange for the underlying securities in the appropriate weighting equaling that redemption unit

As redemption is the opposite process to creation, when demand decreases, the ETF can be dissembled back into single securities.

As a result of the creation/redemption process, the ETF’s portfolio manager typically does not need to buy or sell securities except for rebalancing purposes.

ETF creation and redemption process

Benefits of the Creation/Redemption Process

The creation and redemption process may seem complicated, but it is one of the mechanisms that drives ETFs’ potential benefits.

  • Premium/Discount: Because of the creation/redemption process, APs are always closely monitoring the demand for ETFs, and then buying or selling shares in response. By adding or subtracting ETF shares from the market, APs work to keep an ETF’s share price closely aligned with the value of the assets held in the portfolio, mitigating outsized premiums or discounts of the ETF market price to the ETF net asset value (NAV).
  • Liquidity: In addition, creation/redemption creates two layers of liquidity within an ETF. There’s a layer of available liquidity in the secondary market and a layer of liquidity of the underlying securities. This is why ETF trading volume is not an all-encompassing measure of the fund’s overall liquidity. To understand the full liquidity of an ETF, investors must also consider the liquidity of its underlying securities.