ETF Premium and Discount: How Share Creation and Redemption Work
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ETF Premium and Discount: How Share Creation and Redemption Work
An exchange-traded fund trades like a stock, but inside it holds a basket of assets. For a bitcoin ETF, that is bitcoin held by a custodian.
The price of a share on the exchange and the value of what stands behind it almost always match, and the difference between them is called a premium or a discount.
Below we explain why it is usually tiny and when it grows.
What NAV and an ETF premium are
NAV is the net asset value of the fund per share. The fund adds up the value of everything it holds, subtracts liabilities and divides by the number of shares.
If a share trades above NAV on the exchange, that is a premium; if below, a discount. The gap is calculated as a percentage of NAV.
How ETF share creation and redemption work
New shares are issued not by the exchange but by the fund itself, and only at the request of authorized participants. These are large brokers and banks that have an agreement with the fund.
In a creation, the participant brings the fund cash or assets and receives a block of new shares in return, which it then sells on the exchange. In a redemption, it is the other way around: it hands shares back to the fund and takes the assets or cash.
They work in large blocks. An ordinary investor does not deal with the fund directly - they simply buy and sell shares on the exchange from other participants.
Cash vs in-kind creation: what is the difference
In a cash creation, the participant transfers dollars, and the fund buys the bitcoin itself. In an in-kind creation, the participant brings bitcoin directly and receives shares for it.
At first, US spot bitcoin ETFs worked only with cash; later the regulator allowed the in-kind scheme as well. In-kind has a shorter chain: fewer extra trades inside the fund, which means lower costs that ultimately fall on the holders.
Situation on the exchange | What the participant does | Number of shares | Where the share price goes |
Premium: share above NAV | buys bitcoin, creates shares, sells them on the exchange | increases | down, toward NAV |
Discount: share below NAV | buys shares on the exchange, redeems them with the fund, sells bitcoin | decreases | up, toward NAV |
Price at NAV | does nothing | unchanged | stays at NAV |
Why an ETF's price stays near NAV
It is held there by authorized participant arbitrage. As soon as a share moves to a premium, it pays them to create shares and sell them, and at a discount, to buy up shares and redeem them. Both operations push the price back to NAV.
Let us walk through it with hypothetical numbers, used only for illustration. Say the NAV per share is $50.00, while the share trades at $50.20 on the exchange, a premium of about 0.4%.
Step | Calculation | Hypothetical figure |
Buying bitcoin for a block | 50,000 shares at NAV of 50.00 | minus $2,500,000 |
Creating and selling shares | 50,000 shares at 50.20 | plus $2,510,000 |
Difference before costs | 2,510,000 - 2,500,000 | $10,000 |
Fund creation fee, spreads, hedge | rough estimate | about $4,000 |
Result of the operation | 10,000 - 4,000 | about $6,000 |
We believe this is exactly why a premium rarely lasts long at large funds. As long as something is left over after costs, participants sell new shares, and the gap closes.
When an ETF trades at a premium or discount
The mechanism does not always work equally smoothly. The gap widens in several situations.
- trading hours: bitcoin trades around the clock, while a US ETF trades only during the session, so at the open the share catches up with moves made overnight and over the weekend
- market stress: in a sharp sell-off, participants widen spreads and are more cautious about creating and redeeming shares
- thin liquidity: smaller funds have fewer participants and a wider gap
- closed-end structure: if there is no redemption, arbitrage has nothing to close the gap with
From what we see, at large spot bitcoin ETFs the deviation on normal days is measured in hundredths of a percent. It becomes more noticeable in the first minutes of the session after a strong overnight move in bitcoin.
The GBTC premium: what happens without redemption
The best example is the Grayscale Bitcoin Trust before its conversion to an ETF. The trust issued shares but did not redeem them, so the arbitrage mechanism worked only in one direction.
First the security traded for years at a noticeable premium to the bitcoin inside, then it fell to a deep discount. After the conversion to an ETF in January 2024, redemption started working, and the gap closed.
We covered this story in detail in our article on the GBTC premium and Three Arrows Capital.
How a trader can track an ETF premium
Most funds publish NAV and the premium on their website every day. During the day, the reference point is the indicative value per share, calculated from the current price of bitcoin.
In our view, for an arbitrage trader the ETF premium is more of an indicator than a trade. An individual trader cannot replicate a participant's operation, but a spike in the premium at the open shows well where demand has shifted.
Our tools
An ETF premium reflects demand on a single venue, while real divergences in the price of bitcoin are easier to see across all exchanges at once. Our arbitrage screener keeps dozens of venues in one window, refreshes quotes every second and shows each gap together with the volume actually behind it. The spread calculator helps you check what survives fees, network costs and slippage at your size. The bot is fully manual. It never connects to your exchange API keys.
To test the tools on a live market, ArbitrageScanner offers one day of free access to the whole ecosystem.
FAQ (Frequently Asked Questions)
1. What is an ETF premium in simple terms?
It is when a fund share on the exchange costs more than the net asset value (NAV) per share. The opposite situation is called a discount.
2. Who are ETF authorized participants?
They are large brokers and banks with an agreement with the fund. Only they can create new shares and redeem existing ones in large blocks.
3. What does in-kind creation mean?
The participant brings the asset itself to the fund, bitcoin in the case of a bitcoin ETF, and receives shares for it. In a cash creation, it transfers dollars, and the fund buys the asset.
4. Why do bitcoin ETFs sometimes trade at a premium at the open?
Bitcoin trades around the clock, while an ETF trades only during the session. At the open, the share catches up with bitcoin's overnight move, and for a short time the price drifts away from NAV.
5. Why did GBTC trade at a discount?
Before converting to an ETF, the trust did not redeem shares, so arbitrage could not close the gap. After the conversion in January 2024, redemption started working, and the discount disappeared.
6. Can an individual trader profit from an ETF premium?
An individual trader cannot create or redeem shares directly; only authorized participants can. The premium is better used as an indicator of demand.
Conclusion
An ETF premium or discount is the difference between the share price on the exchange and the value of the assets inside. Authorized participants keep it near zero by creating and redeeming shares whenever the gap becomes profitable.
The gap widens when the exchange is closed, during stress and at funds without redemption, as was the case with GBTC. For a trader, the premium is a useful indicator of demand, not a standalone trade.
IMPORTANT! We are software developers. We do not give recommendations or promises of earnings and we do not advise you to invest your money anywhere. Our software is fully manual, all your money stays under your own control. We show examples of how our clients have earned on arbitrage in the past, but we do not advise repeating those actions one to one. Your earnings depend solely on your own actions and on market factors.
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