MSY, issued by Main St Finance Ltd, is a tokenized vault share representing exposure to a market-neutral options-funding yield strategy that automatically accrues real-world, USD-denominated yield from short-duration box spreads [S1].

MSY tracks an institutional options-funding strategy that turns CME-style index box spreads into market-neutral, USD-denominated yield and uses box spreads structured to have effectively no delta or gamma, so day-to-day moves in the underlying have minimal impact on profit and loss [S1]. The token automatically accrues yield as a vault share rather than distributing it [S1]. Holding MSY also earns one Gamma per day per dollar under the platform's incentive program, with Gamma rates subject to adjustment at Main Street's discretion [S1].

MSY is issued by Main St Finance Ltd, which operates the Main Street platform [S2]. The Terms of Use are governed by the laws of the jurisdiction in which Main St Finance Ltd is incorporated, with disputes resolved in the competent courts of that jurisdiction [S2]. The issuer claims no license and presents the products solely for informational and transactional purposes, stating they do not constitute financial, investment, legal, or tax advice [S2]. Users must confirm they are at least 18 years of age and have legal capacity [S2]. A withdraw and directRedeem path converts the vault token back [S1]. The issuer disclaims liability for smart contract vulnerabilities [S2].

MSY behaves as an ERC-4626 tokenized vault, with standard onchain mint, redeem, and withdraw functions surfaced by the app, and is deployed on Ethereum mainnet, where a public MSY/USDC lending market is linked [S1]. Reserve and collateral status is published through a live, cryptographically signed Proof of Reserves dashboard powered by a third-party verifier, Accountable [S1][S3].

<Sources
  retrievedAt="2026-06-22"
  items={[
    { id: "S1", url: "https://mainstreet.finance/" },
    { id: "S2", url: "https://mainstreet.finance/tos.pdf" },
    { id: "S3", url: "https://por.mainstreet.finance/dashboard" },
  ]}
/>


Tokenized funds

The platform operates through smart contracts and decentralized protocols to deliver financial services with reduced intermediaries and enhanced transparency. MainStreet likely employs a token-based ecosystem to facilitate transactions and governance while generating revenue through protocol fees and service charges.

The project develops financial infrastructure and services that leverage blockchain technology to provide accessible financial products. MainStreet aims to democratize access to financial services by creating decentralized alternatives to traditional banking and investment products.

MainStreet is a blockchain-based financial platform that appears to focus on bridging traditional finance with decentralized finance solutions.

website

Stablecoin issuers

Main Street

Main Street Yield (MSY) is a tokenized fund share issued by Main Street.

Retail investors, professional investors, accredited investors, qualified investors, qualified purchasers, and institutions can subscribe and redeem in msUSD.

MSY has been issued on Ethereum as an ERC-4626 token since December 2025.

Main Street YieldMSY