Nadbell

Nadbell is a 24/7 mock stock market on Monad testnet. The real AAPL price freezes when Nasdaq closes at 4pm ET; Nadbell's onchain order book keeps trading, so you can watch the weekend price form instead of waiting until Monday. How it works: - A keeper relays AAPL's live price (Alpaca IEX) every 5 minutes while NYSE is open, then rings the closing bell and freezes it. - A fully onchain limit order book trades tAAPL against test USDC around the clock. A small maker bot keeps quotes on the book; on weekends it follows the last trade, so users move the price. - "Call the open": while the market is closed, anyone can lock a free guess at Monday's opening price. At the reopen, every call and the weekend market are scored against the real open, with a leaderboard. - Built for normal users: three-step onboarding, test-dollar faucet, "Buy $100" / "Sell all" buttons, no approval pop-ups. - tAAPL copies how real stock tokens work (Robinhood-style display multiplier for dividends and splits, issuer-style mint and redeem only during market hours). Problem: news breaks on Friday nights and weekends, but stocks only trade about 32 of 168 hours a week. Nadbell shows what an always-open market makes of that news, and how well it predicted Monday's open. Stack: Solidity (Foundry, 26 tests), viem, React, GitHub Actions keeper. Testnet only; tAAPL and tUSDC are mock tokens with no value and no link to Apple or any issuer.