How NIGIRI works
NIGIRI has two halves: a live dashboard that tracks the premium between Robinhood's tokenized stocks and their real closing price (Implied Open), and Predict, where you can actually bet on which way a stock moves — with real ETH or with fETH, a free internal-wallet currency that needs no wallet at all. Robinhood Chain testnet only.
The premium — Implied Open
Robinhood's tokenized stocks (NVDA, AAPL, TSLA, …) trade 24/7 on Robinhood Chain, but the real exchange only prices them during market hours. The gap between the token's live price and its frozen official close — the premium— is the on-chain crowd's running bet on where the stock reopens.
Predict: UP/DOWN markets
Every predictable ticker runs non-custodial, pari-mutuel markets: put ETH on UP or DOWNbefore the market locks. Winners split the losing side's pool pro-rata to their stake — nobody, including NIGIRI, decides the outcome.
Two kinds of market, same mechanic, different window:
- Trading session — up or down between the open and close of a single NYSE session.
- Weekend gap— bet Friday's close (16:00 ET) against Monday's open (09:30 ET).
fETH: your internal wallet
fETH (fake ETH) lets anyone play the same UP/DOWN markets with zero setup — no wallet extension, no gas, no signup.
Claim 0.1 fETH once a week, then bet it on UP or DOWN just like an ETH market.
Weekly leaderboard + champion bonus
Every fETH bet counts toward the weekly leaderboard — ranked by net (winnings minus stakes) since the current Thursday reset.