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Ampleforth is an Ethereum-based protocol whose AMPL token has an elastic supply. Instead of keeping every wallet balance fixed, its supply policy can increase or decrease balances proportionally. The project describes AMPL as a unit of account for decentralized finance, with a price target tied to the purchasing power of the 2019 US dollar. That target is a design objective, not a promise that a holding will maintain its value.
How an AMPL rebase works
A rebase adjusts the units in circulation. Ampleforth's documentation describes a daily adjustment informed by market-price data: sufficient deviation above the target can produce an expansion, while sufficient deviation below it can produce a contraction. A threshold and adjustment curve govern how the policy responds.
The unusual part is what happens to ownership. If all applicable balances grow by the same proportion, a holder's share of the network is unchanged by that adjustment alone. The holder owns more units but not a larger slice. Similarly, a negative rebase reduces the number of units without, by itself, changing that relative share.
Consider a simplified example unrelated to current market conditions. A wallet containing 100 units before a 5% expansion would contain 105 afterward. That extra five units does not prove a 5% economic gain. The market price can change at the same time. The same logic applies when balances shrink: units and purchasing power are different measurements.
Why AMPL is not a cash balance
A conventional cash-backed stablecoin typically represents an issuer's arrangement to support a nominal currency value. AMPL uses a supply mechanism instead. A target linked to an inflation-adjusted dollar is also different from a permanent one-dollar quote.
The practical consequence is that an AMPL price chart alone cannot describe a holder's result. A complete record must include purchases, sales and changes in token quantity. Looking only at the initial and final token prices can miss much of the change in the holding.
The protocol's documentation expresses strong confidence in its long-run monetary design. Readers should separate that position from certainty about market behavior. A mechanism intended to encourage movement toward a target does not remove liquidity risk, software risk or changes in demand.
WAMPL wraps the exposure differently
Wrapped AMPL, or WAMPL, is a non-rebasing ERC-20 representation of AMPL deposited in a wrapping contract. Its purpose is to make integration easier for systems that expect token balances to stay constant between transfers. The wrapper changes the representation of the exposure; it does not turn the underlying asset into cash.
Official documentation sets WAMPL's maximum theoretical supply at 10 million units if the entire AMPL network were wrapped. Actual wrapped supply depends on how much AMPL users deposit. It would be incorrect to add the full value of wrapped tokens to their underlying AMPL and treat the result as two unrelated pools of economic value.
A user choosing between AMPL and WAMPL is therefore choosing a form of accounting and integration as well as an asset interface. Contract identity, the supported network and the wrapping or unwrapping process all matter. A similarly named token on another network is not automatically the same instrument.
FORTH governs the ecosystem
FORTH is a separate governance token. The project assigns it a role in decisions concerning protocol parameters, incentives and treasury resources. Holding AMPL is not the same as holding FORTH, and an AMPL rebase should not be confused with a governance-token distribution.
This separation helps explain why Ampleforth should be assessed as a system with several components. Monetary design, governance and applications have different responsibilities. Success in one area does not automatically resolve risks in the others.
Where the mechanics become operational risks
Custodians and applications need to account correctly for rebases. A service must explain how it credits rebases and represents customer claims. Otherwise, its displayed account balance may be difficult to reconcile with the underlying token accounting. Correct integration is necessary; the existence of a token standard does not prove that every platform implements its economics correctly.
Lending, wrapping and bridging also introduce additional contracts and, where relevant, networks. Before interpreting an advertised return, distinguish changes caused by supply policy from interest, incentives and token-price movement. An increasing token count is not automatically yield.
As of October 8, 2026, official Ampleforth documentation and application resources remain available. This profile describes their documented design, without certifying individual applications or quoting a live price. The central fact remains simple: AMPL changes balances, so evaluating it requires tracking both the quantity held and the value of each unit.