Eligible institutional and professional clients can trade spot, OTC options, structured products and quantitative investment strategies across these assets 24 hours a day, including when US markets are closed, STS said in a statement today. Positions sit in one cross-margined account with STS as the single counterparty. Clients can already post tokenized gold or equity ETFs as collateral against crypto options positions.

The initial universe covers tokenized versions of major US index ETFs, large-cap equities, forex, gold and oil. 

STS said it intends to add more single names, structured products and asset classes as liquidity develops. Settlement is in stablecoins or the relevant tokens. Access is through STS’s trading desk, client portal and API, and availability varies by jurisdiction.

STS holds a Class F license from the Bermuda Monetary Authority under the Digital Asset Business Act. 

Each listed tokenized asset undergoes due diligence on its issuer, backing, redemption structure, reserves, custody and liquidity, the firm said. STS already offers trading in more than 400 tokens. Its backers include CMT Digital, Kraken parent Payward, Arrington Capital, Strobe Ventures, F-Prime and BitRock Capital.

“In traditional markets, a share or a bar of gold sits in a custody account, and moving it between brokers takes days,” said Maxime Seiler, co-founder and chief executive. “Tokenized, the same asset moves like a stablecoin: instantly, in any size, around the clock. That makes it collateral.” Seiler said about $40 billion of tokenized real-world assets are now on-chain.

The move puts STS among a growing group of crypto-native firms bringing traditional assets onto blockchain rails. Kraken and Robinhood both launched tokenized stock products for non-US clients in 2025. STS is aiming at institutional derivatives and collateral use rather than retail access.