Overnight.fi USD+ (Base)

Overnight.fi USD+ (Base), commonly shortened to USD+, is a cryptocurrency launched in 2023. It functions as a fully collateralized stablecoin, anchoring its value to the U.S. dollar through a transparent reserve of USDC, DAI, and USDT.

The token’s design addresses a persistent friction in digital asset markets: the absence of a dollar-equivalent that simultaneously shields capital from volatility and compounds it passively. Across Arbitrum, Base, Optimism, Linea, Blast, and zkSync, USD+ delivers a stable peg with daily yield payouts typically hovering between 8% and 12% APY. No staking lockups or liquidity pool deposits are required—the returns accrue automatically to all token holders.

USD+ operates on the Base network, an Ethereum Layer‑2 rollup. It does not require its own consensus mechanism; instead, it leverages Base’s infrastructure to secure state transitions. The token’s collateral pool is deployed into a curated set of low-risk DeFi strategies, with daily attestations of the reserve’s composition published by independent third parties.

It is a standard ERC‑20 token augmented with an elastic supply mechanism. Every 24 hours, a rebase event recalibrates wallet balances across the entire holder base. If the net asset value of the backing portfolio rises above the par value of issued tokens, a positive rebase mints additional units directly into each address; a dip below full collateralization triggers a negative rebase that contracts holdings. The protocol also exposes a live Liquidity Index, making the ratio of circulating supply to strategy-allocated assets auditable in real time.

The Overnight.fi team introduced the product on August 3, 2023, bringing a yield-on-stablecoin primitive to the then‑nascent Base ecosystem. The founding group remains unnamed in public materials, operating behind the @overnight_fi handle and a repository at GitHub under ovnstable. Within months, liquidity pooled across nine centralized exchanges and 22 trading pairs, and the token fanned out to six additional chain deployments, signaling fast cross‑network adoption.

The project’s ambition is not to reinvent money but to give money a constant, low‑effort earning capacity. By stripping away the complexity of yield farming, USD+ aims to function as a universal settlement layer where every dollar held works—without human intervention, governance votes, or active management. It sits at the intersection of traditional stablecoin utility and the mechanical accrual of DeFi returns, all while maintaining a strict 1:1 backing with blue‑chip stables.

Mechanically, the token serves as a perpetual claim on the reserve portfolio. Holders do not receive separate reward tokens; instead, the protocol’s smart contract suite marks up the quantity of USD+ in each wallet when the underlying strategies generate profit. This rebase‑based distribution ensures that token balances always mirror a pro‑rata share of the collateral pool. Negative rebases, rare by design, shrink supply uniformly when strategy performance or market dislocation temporarily depresses the asset value below full coverage.

Validators do not exist in this system, but users step into concrete roles. A volatility‑exposed trader can rotate spot crypto into USD+ and watch the balance tick up daily without lending out assets. A freelancer in a high‑inflation jurisdiction stores invoice settlements in the token and receives incremental yield while maintaining dollar purchasing power. Even idle wallets on Base accrue value, because the rebase fires network‑wide; holding is the only prerequisite.

USD+ has an unlimited supply, as its token count resets daily through rebasing. Currently, 998,052.74 tokens are in circulation. The rebase mechanism algorithmically inflates or deflates the circulating supply based on collateral performance, meaning the total supply never reaches a fixed ceiling. With a market capitalization of $997,809.00, Overnight.fi USD+ (Base) ranks #2,977 among all cryptocurrencies.