Every big name, around the clock.
Stock tokens and coins on Robinhood Chain, each priced every hour from its own pool against USDG: the price at the last block of the hour. They trade at night and on weekends, and so can an agent.
These are token prices on chain, not exchange quotes. Outside US market hours a stock token trades on its own, so it can drift from where the real stock will open. A market is a fixed contract address on an allowlist, never a name: lookalike tokens are ignored.