Synthetic dollars: from basis trade to credit

A synthetic dollar is a token that holds its value at one dollar without holding dollars. The design that came to dominate the category backs each token with a crypto asset, usually staked or spot ether and bitcoin, and an equal short position in that asset’s perpetual futures. Price moves in the collateral are canceled by the short. What remains is the funding paid by leveraged longs to the short, plus any staking yield on the collateral, and that is passed through to holders who stake the token.

The mechanism and its failure mode

The structure works when funding is positive, which in a long-biased market it usually is. Its known weakness is the opposite regime. When perpetuals trade below spot, typically during a sharp sell-off as leveraged longs unwind, the short leg pays funding rather than receiving it. Pharos’s risk profile of the staked token describes the intended defense: a reserve fund absorbs short or shallow negative prints, and the yield to holders falls toward zero rather than turning negative. A prolonged inversion would test the reserve, and the collateral held on exchanges is exposed to those exchanges’ failure.

What changed in 2026

Funding compressed as the market matured and more capital chased the same trade. Reporting from June 2026 describes the largest issuer stepping back from farming the basis and signing overcollateralized lending agreements with institutional desks, placing part of the backing into credit rather than into the hedge. The token’s name and peg did not change. Its risk did: the old failure mode of funding inversion and exchange counterparty stress was partly replaced by borrower credit and liquidity risk. A March 2026 analysis argued that the token had also become one of the most systemically important pieces of collateral in decentralized finance, held across lending markets where a problem in its backing would propagate.

• Basis-backed: yield from funding and staking; risks are negative funding and exchange custody
• Credit-backed: yield from institutional borrowers; risks are borrower default and loan liquidity
• Mixed backing: the risk profile is a weighted blend that changes as the issuer reallocates
• Systemic use as collateral means a backing problem does not stay with the issuer

How to hold one

As what it is rather than what it is called. A synthetic dollar is a funding position, or increasingly a credit position, in dollar form. It belongs in a yield sleeve sized against the scenario in which funding stays negative or a borrower fails, not in a cash balance. Its published backing composition should be monitored for reallocation, because the instrument’s risk changes when its backing does and the holder is not asked. And where it is used as collateral in lending markets, the loan-to-value applied to it should reflect the weakest component of its backing, not the peg.

The regulatory footnote

Synthetic dollars sit outside the definition of a payment stablecoin under the new US federal framework, which is why they can continue to pass yield to holders when payment stablecoin issuers cannot. That is a legal distinction with a real consequence: the instrument is not supervised as a payment stablecoin, its reserves are not held to a payment stablecoin’s standard, and a holder’s protection is the design and the issuer’s disclosure rather than a regulator.