Lighter launches BTC and ETH binary options on Core

Lighter, the Ethereum zk-rollup exchange best known for perpetual futures, has added a simpler product to its menu: binary options on Bitcoin and Ethereum. The feature went live on Lighter Core on October 19, 2026. It is a notable departure for a platform whose identity has been built on leveraged perpetual contracts. How the Up/Down contracts work The new contracts are structured as Up/Down markets. Traders take a view on whether BTC or ETH will move higher or lower. Each winning share pays out 1 USDC. A losing share, by the nature of a binary contract, pays nothing. Every position must be fully funded in USDC before it opens. That single design choice removes leverage from the equation entirely. No leverage also means no liquidations. The most you can lose is what you paid for the share. Trading runs on an order-book model, the same matching structure that underpins Lighter’s existing markets. Buyers and sellers post bids and asks, and prices are set by where they meet rather than by a formula. A launch that was weeks in the making The rollout did not appear out of nowhere. Around September 20-21, 2026, Lighter pushed a codebase update that added ZK circuit support for binary out...