Rialto

Rialto is an on-chain spot exchange for trading tokenized equities, ETFs, commodities, crypto assets, and pre-IPO assets with best-execution routing within the Robinhood Chain ecosystem. Launched from stealth in July 2026 after about one year of development, the project was developed in collaboration with Robinhood Crypto, Offchain, and Arbitrum, and uses a proprietary automated market maker model called PropAMM.

Technology & Architecture

Rialto's liquidity mechanism is implemented as proprietary automated market makers called PropAMMs. These on-chain market makers quote prices based on their own pricing logic and inventory rather than using a passive constant-product pool. Rialto's PropAMM implementation, Rivo Altus, provides baseline on-chain liquidity while competing alongside conventional DEX pools and third-party market makers for individual quotes. The platform quotes candidate liquidity sources on-chain at request time, ranks routes by expected output net of gas costs, and settles the selected route. The implementation uses Arbitrum's Stylus tooling for custom on-chain pricing logic and relies on Robinhood Chain's low block times and Ethereum composability. ^{[5] [3]}​

Products & Use Cases

At launch, Rialto supported trading of more than 90 tokenized Robinhood stock tokens alongside major crypto assets. Users can self-custody equity tokens and use them as collateral with third-party lending services. Rialto also operates a token issuance/launch mechanism called Varo, based on Uniswap V3 contract architecture, which enables tokens with a fixed supply to be traded via integrated liquidity positions without custom bonding curves. ^[7]​