Home
Contact

← Projects · Sep–Oct 2026

Afterglow

Fixed-rate USDG lending against tokenized stocks on Robinhood Chain, with rules that follow the stock market’s clock: lenders are paid to carry the weekend instead of absorbing its gaps.

afterglow-credit.vercel.app ↗demo video ↗

Tokenized stocks trade around the clock on-chain, but their prices don’t: the feeds stop at Friday’s close and resume on Sunday night. A lending market then has two bad options. If it keeps lending on Friday’s stale price, a Monday gap becomes the lenders’ bad debt; if it freezes, borrowers can’t even repay.

Afterglow follows the stock market’s clock instead. Borrowers pledge stock tokens and borrow USDG at a fixed rate to a fixed date. The borrow limit eases from 55% to 45% in the four hours before the close, new borrowing pauses while prices are frozen, and repaying always works. Every loan pays a weekend premium, priced from the stock’s real weekend price gaps, and lenders pick a side of the weekend: Protected is paid first, while Boost takes weekend losses first and keeps the premium.

The contracts are in Solidity, and the weekend-gap model, GapGuard, is in Rust on Arbitrum Stylus. Afterglow runs on Robinhood Chain testnet with TSLA and AMZN markets, on Chainlink prices mirrored from mainnet, and is covered by 97 unit and fuzz tests and 5 fork tests against Robinhood Chain mainnet. I built it for the Arbitrum Open House Singapore online buildathon in September and October 2026. It is unaudited and testnet only.

Afterglow’s front page: “Earn yield, even while Wall Street sleeps”, a low sun over a glowing horizon, and a card showing TSLA’s borrow limit at 55.00%, stepping down to 45% for the weekend, with live NVDA, SPY and USDG prices.
The front page: the sun follows the real 24/5 market clock, beside TSLA’s live borrow limit, 55% on weekdays and 45% over the weekend.
The borrow terminal on the AMZN/USDG market: a week chart where the borrow limit holds at 55% from Monday to Friday and drops to 45% at the close, with the liquidation line at 65%, GapGuard readings below it, and a borrow form on the right.
The borrow terminal on the AMZN market: the limit eases from 55% to 45% before Friday’s close, and GapGuard prices the weekend premium at 5.6 bp from AMZN’s 0.57% weekend-gap volatility.
The Earn page: a table of lender vaults, Protected and Boost for AMZN and TSLA, with deposits, backing, role (paid first or first loss), cover and APY.
Earn: lenders choose Protected, paid first at a 5% target, or Boost, which takes losses first and keeps the rest.