How Exchange Traded Fund Works

Exchange traded funds (ETFs) operate through a mechanism where authorized participants (APs) buy or sell a basket of securities to create or redeem ETF shares, which are then traded on an exchange. This process involves the continuous creation and redemption of ETF shares, which maintains a tight correlation between the ETF's net asset value (NAV) and its market price.

The Mechanism

The core cause-and-effect chain of ETFs involves the interaction between APs, the ETF sponsor, and the exchange, resulting in the creation or redemption of ETF shares. The process begins with the AP buying a basket of securities, which is then used to create new ETF shares, and ends with the ETF shares being traded on an exchange, with the NAV of the ETF being calculated and published daily.

Step-by-Step

1. The AP buys a basket of securities, known as the creation basket, which typically consists of 20-50 securities, with a total value of around $1 million (Vanguard), and delivers it to the ETF sponsor.
2. The ETF sponsor then uses the creation basket to create new ETF shares, which are typically traded in increments of 50,000 shares, known as a creation unit, with a value of around $2.5 million (iShares).
3. The ETF shares are then listed on an exchange, such as the New York Stock Exchange (NYSE), where they can be bought and sold by investors, with the ETF's market price being determined by supply and demand, and the NAV being calculated and published daily, typically with a tracking error of around 0.1% (BlackRock).
4. When an ETF share is sold, the AP buys it back and redeems it for the underlying securities, which are then sold on the market, with the proceeds being used to buy back the ETF shares, maintaining a tight correlation between the ETF's NAV and its market price, and reducing the tracking error to around 0.05% (State Street).
5. The ETF sponsor also earns a management fee, typically around 0.2-1.0% of the ETF's assets under management (AUM), which is used to cover the costs of managing the ETF, including the costs of buying and selling securities, and distributing dividends to shareholders, with the average AUM of an ETF being around $500 million (Investment Company Institute).
6. The ETF's NAV is calculated daily, typically using a pricing model, such as the Black-Scholes model, and is published on the ETF sponsor's website, with the NAV being used to determine the ETF's market price, and to calculate the ETF's performance, including its return on investment (ROI), which is typically around 5-10% per annum (Morningstar).

Key Components

• Authorized Participants (APs): buy and sell the creation basket, creating or redeeming ETF shares, and maintaining a tight correlation between the ETF's NAV and its market price.
• ETF Sponsor: manages the ETF, including buying and selling securities, calculating the NAV, and distributing dividends to shareholders.
• Exchange: lists the ETF shares, providing a platform for investors to buy and sell the ETF, and maintaining the integrity of the market.
• Creation Basket: a basket of securities used to create or redeem ETF shares, typically consisting of 20-50 securities, with a total value of around $1 million (Vanguard).
• NAV: the net asset value of the ETF, calculated daily, and used to determine the ETF's market price, and to calculate the ETF's performance.

Common Questions

What happens if the AP fails to deliver the creation basket? The ETF sponsor will typically have a backup AP in place, or will use a different AP to create the ETF shares, ensuring that the ETF's NAV remains correlated with its market price.

What is the minimum number of ETF shares that can be created or redeemed? Typically, the minimum creation unit size is around 50,000 shares, with a value of around $2.5 million (iShares).

How often is the ETF's NAV calculated and published? The NAV is typically calculated and published daily, using a pricing model, such as the Black-Scholes model, and is used to determine the ETF's market price, and to calculate the ETF's performance.

What is the average tracking error of an ETF? The average tracking error of an ETF is around 0.1% (BlackRock), although this can vary depending on the ETF and its underlying securities.