Creation and redemption: how ETP shares are made and unmade

An exchange-traded product has two markets, and only one of them is visible on a screen. In the secondary market, shares change hands between investors on an exchange. In the primary market, a small set of approved firms delivers assets to the trust and receives newly issued shares, or delivers shares back and receives assets. That primary process is what keeps the share price close to the value of the holdings, and when it stops working the tether fails.

The creation unit and who may use it

Shares are not issued one at a time. The trust deals only in creation units, large blocks that in practice run into thousands or tens of thousands of shares. Only an authorized participant may present or receive one. An authorized participant is a broker-dealer that has signed an agreement with the sponsor and the distributor; it is not an agent of the trust, it has no obligation to create or redeem, and it earns nothing from the sponsor for doing so. Its incentive is arithmetic: it acts when the exchange price of the shares differs enough from the value of the underlying to cover its costs.

The sequence for a creation is simple in outline. Demand for shares pushes the exchange price above the value of the assets each share represents. An authorized participant assembles the required assets, delivers them to the trust before the day's cut-off, receives a creation unit of new shares, and sells those shares into the market. Supply rises, the price gap narrows, and the trust's holdings have grown by exactly what was delivered. A redemption runs the film backwards: the participant buys shares in the market, delivers a creation unit to the trust, receives assets, and sells or keeps them. Shares are cancelled and the holdings shrink.

This is why the outstanding share count of a listed product is not a fixed number. Flows into and out of a product show up directly as changes in coins held by ETPs and in ETP assets under management, and the second of those also moves with price, so the two series answer different questions and should not be read as substitutes.

In kind and in cash

In-kind creation means the authorized participant delivers the underlying asset itself and receives shares, or delivers shares and receives the asset. Cash creation means the participant delivers money, and the trust or an agent it appoints buys the asset in the market. The difference sounds procedural. It moves cost, risk and tax consequences between parties.

The United States spot bitcoin products that listed in January 2024 launched with a cash model, in which authorized participants deliver dollars and never touch the asset. The reason was structural rather than economic: the large broker-dealers that act as authorized participants operate under rules written for securities and cash, and delivering a bearer digital asset raised questions about capital treatment, custody and clearing that the cash route sidesteps. European products, which are usually built as debt securities backed by assets rather than as trusts, have used in-kind transfer far longer. Whether a given product creates in kind, in cash, or in either form at the sponsor's option is set out in its own offering documents, and it changes over time as rules change.

Why the mechanism holds the price together

The tether is not a promise. Nobody guarantees that a share trades at the value of its holdings. What exists is an arbitrage incentive that is exercised by parties acting for themselves. If the share trades above the value of the underlying by more than the cost of doing the trade, creating shares and selling them is profitable, and the act of doing it closes part of the gap. If the share trades below, buying shares and redeeming them is profitable, with the same self-correcting effect. Market makers that are not authorized participants play the same game at higher frequency by hedging inventory and passing blocks to a participant at the end of the day.

Costs set the width of the band, not the existence of it. The relevant costs are the bid-ask spread in the shares, the spread and depth in the underlying spot market, the cost of hedging overnight, the trust's own transaction charges, and the capital tied up between the trade and settlement. Deep markets and low-cost hedging produce a narrow band. Thin markets, wide underlying spreads, or an inability to short the shares produce a wide one. Products on assets with modest turnover, readable through turnover and 30-day volume, tend to sit in wider bands than products on the largest assets.

When the mechanism breaks

The interesting cases are the ones where the primary market stops. A trust with no redemption program at all is the extreme: shares can be created but never destroyed, so the corrective trade only works in one direction and a discount can persist indefinitely. That is the situation described on the page about premium and discount, and it is not hypothetical history.

Softer failures matter too. A creation window can be suspended when the custodian cannot transact, when a reference market is halted, or when a sponsor pauses issuance for regulatory reasons. Settlement mismatches arise because the asset settles within minutes on-chain while the share settles on the exchange's normal cycle, leaving the participant exposed in between. A single authorized participant that steps back on a stressed day removes a meaningful share of primary-market capacity, since the roster for any given product is short. Each of these widens the band rather than breaking the product, but the widening arrives exactly when the underlying market is least liquid.

Readers following this thread can go on to the page on net asset value and the Grayscale discount, which shows what a broken redemption path looks like in practice, and then to the fee page, which quantifies the running cost of the wrapper. Flow and holdings series for listed products sit on the ETP pages, and the underlying trading conditions that set the arbitrage band can be read on asset pages.