Invesco Short Duration US Government Securities Fund

What Is USTB?

USTB is the ticker for the Superstate Short Duration U.S. Government Securities Fund, a blockchain-native investment fund created by the financial technology company Superstate. Rather than being a conventional cryptocurrency, USTB represents shares of a registered fund that holds short-duration U.S. government debt — Treasury bills, Treasury notes, and government-backed repurchase agreements — while using a public blockchain as an official, real-time record of share ownership alongside traditional fund administration. At current levels the token trades at roughly $11.22, with a market capitalization of approximately $756,702,061, placing it around rank #91 among tracked digital assets. Its 24-hour trading volume of near $0 is characteristic of the token: USTB is not designed to be actively traded on public exchanges but is instead subscribed to and redeemed directly through the issuer.

The project sits at the intersection of traditional asset management and distributed-ledger technology, part of the broader “real-world asset” (RWA) tokenization movement that has also produced tokens such as USD Coin and other yield-bearing dollar instruments. Full details, documentation, and eligibility requirements are published on the issuer’s own site, which can be found at superstate.com/assets/ustb.

The Problem It Solves

Institutions, DAOs, and crypto-native treasuries that hold large dollar balances on-chain have historically faced an awkward choice: keep funds in non-interest-bearing stablecoins like Tether, or exit the blockchain entirely to access traditional money-market yields through a bank or brokerage. Superstate was built to close that gap by giving investors a way to hold exposure to short-term U.S. government securities — historically one of the safest and most liquid asset classes in traditional finance — directly as a blockchain-based token, with near real-time settlement and transparent, on-chain record-keeping. In effect, USTB tries to bring a familiar, conservative fixed-income product into the same technical rails used by cryptocurrencies such as Ethereum, without abandoning the regulatory protections of a registered investment vehicle.

This differs meaningfully from typical fiat-backed stablecoins, whose issuers usually keep the interest earned on reserves for themselves while giving holders a non-yielding token. USTB instead passes the underlying yield of its government-securities portfolio through to fund shareholders, positioning it as a yield-bearing instrument rather than a payment stablecoin.

History and Founders

Superstate was founded in 2023 by Robert Leshner, an entrepreneur previously best known for founding Compound Labs and the Compound lending protocol, one of the earliest and most influential decentralized finance (DeFi) money-market platforms built on Ethereum. Leshner had already experimented with bridging traditional treasury yield and crypto through an earlier initiative, Compound Treasury, which let institutions convert dollar stablecoins into exposure to short-term government bonds. Drawing on that experience, he launched Superstate together with co-founder Allison Lu, who had previously led that Compound Treasury effort and brought a background in traditional finance to the new venture.

Superstate positioned itself explicitly as a regulated asset manager rather than a crypto protocol, registering its funds under U.S. securities law and working within existing fund-administration frameworks while adding blockchain as a parallel settlement and record-keeping layer. The Short Duration U.S. Government Securities Fund launched in early 2024 as one of the first mutual-fund-style vehicles in the United States to offer shares that could be recorded and transferred natively on a public blockchain, a structural innovation that drew significant attention from both the fintech press and traditional asset managers watching the tokenization trend.

How the Technology Works

USTB’s design keeps one foot in each world. Legally, the fund is organized and administered like a conventional registered investment vehicle, with a transfer agent, custodian, auditor, and net asset value (NAV) calculated daily based on the market value of its underlying Treasury holdings. Technologically, ownership of fund shares is also recorded as tokens on a public blockchain — initially Ethereum — that function as the authoritative record for that class of shares, rather than merely a wrapped or derivative representation of an off-chain account.

Eligible investors — generally accredited investors and qualified purchasers who complete Superstate’s onboarding and compliance checks — can subscribe by sending stablecoins such as USD Coin, which are used to purchase Treasury bills and related government instruments on their behalf. In return, they receive USTB tokens reflecting their proportional share of the fund’s NAV. Redemptions work in reverse: investors return tokens to the issuer and receive stablecoins or other agreed settlement back, with the fund aiming to process subscriptions and redemptions faster than the multi-day settlement cycles typical of traditional Treasury funds. Because transfers are restricted to verified wallets belonging to eligible holders, USTB does not trade freely on open exchanges the way permissionless tokens like Bitcoin or Solana do — a key reason its reported 24-hour trading volume is effectively zero. Over time, Superstate has expanded the fund’s technical footprint beyond a single chain, aligning with a broader industry push to make tokenized real-world assets interoperable across multiple blockchain networks rather than siloed on one.

Tokenomics and Supply

USTB does not have a fixed maximum supply in the way that many native cryptocurrencies do. Instead, its circulating supply expands and contracts continuously as investors subscribe to and redeem fund shares, meaning total token supply is a direct reflection of the fund’s assets under management rather than a pre-programmed emission schedule. Each token’s price is tied to the fund’s NAV per share, which starts near a nominal baseline and rises over time as the underlying Treasury portfolio accrues interest — explaining why USTB trades above its original issuance price today. There is no mining, staking, or inflationary reward mechanism; value accrual comes purely from the yield generated by short-duration government securities held in the fund’s portfolio, distributed to holders through NAV appreciation rather than periodic token distributions.

Notable Milestones and Controversies

Superstate’s launch of USTB was widely covered as one of the first instances of a U.S.-registered fund treating a blockchain ledger as an official book of record for share ownership, a structural step beyond earlier “tokenized Treasury” products that merely wrapped fund shares in a separate token layer. The company followed with additional products expanding into other short-term yield strategies, reinforcing its focus on bringing traditional fixed-income exposure on-chain under a compliant fund wrapper. Its founder’s earlier project, Compound Treasury, had already demonstrated both the appeal and the operational complexity of linking DeFi liquidity to real-world Treasury yield, experience that directly informed Superstate’s more heavily regulated approach.

As with other tokenized real-world-asset products, USTB has faced scrutiny over questions that the whole RWA sector is still working through: how blockchain-based ownership records interact with securities law, how transfer restrictions affect liquidity, and how much investors can rely on an issuer’s infrastructure when the underlying assets live off-chain. Because USTB is offered only to eligible institutions and is not listed on any exchange, critics have also pointed out that it is more of a private fund with a token wrapper than a freely tradable digital asset, which limits its appeal for ordinary retail users.

Invesco Takes Over Portfolio Management

The most significant milestone in the fund’s history came on March 24, 2026, when global asset manager Invesco and Superstate announced that Invesco would become the investment manager of the fund. Day-to-day portfolio decisions moved to Invesco’s Global Liquidity team, a group that oversees hundreds of billions of dollars in money market and cash products. Superstate continues to run the technical side, including tokenized issuance, blockchain-based settlement, and digital transfer agency services. Upon completion of the transition, the product was renamed the Invesco Short Duration US Government Securities Fund, while keeping the same USTB ticker, smart contracts, and token address, so existing holders did not need to migrate anything.

Robert Leshner described the deal as the first time an independent asset manager has used Superstate’s tokenization infrastructure. For the wider market, the move is read as a signal that established asset managers now prefer to plug into existing on-chain rails rather than build their own from scratch, a trend that could bring more traditional players into the space alongside networks like Ethereum.

Where USTB Is Used in DeFi

Although the fund itself is restricted to allowlisted wallets, its tokens are not locked away from decentralized finance. Eligible holders can use USTB as collateral in lending markets such as Aave on Ethereum and Kamino on Solana, which lets institutional treasuries borrow against their Treasury exposure without redeeming it. Shares can be issued as tokens on Ethereum, Solana, and Plume, or held in book-entry form and converted to tokens later. This multi-chain approach is meant to make the fund easier to plug into whichever network an institution already uses, and Superstate has said it plans to keep expanding DeFi integrations and support across the crypto ecosystem.

Who Can Invest and How

Investing starts with opening an account on the Superstate portal, completing onboarding and compliance checks, and adding a wallet to the fund’s allowlist. The fund is aimed at accredited investors and qualified purchasers, and the typical minimum initial investment is $100,000 unless waived. Subscriptions can be paid in USD or in USD Coin. Because the fund is continuously priced, a USDC order is priced at the current NAV per share and delivered immediately, even on weekends, while USD wires are generally handled the same day if received before the cutoff. Redemptions follow the same portal-based process, with liquidity available each market day. Full instructions and current fund data are published on the official Superstate USTB page.

Risks and Limitations

Holding a tokenized Treasury fund is far safer than holding most crypto assets, but it is not risk-free. The value of the shares can still fluctuate slightly with interest-rate moves, even though short-duration bills keep that sensitivity low. Investors also face smart-contract and wallet risk, dependence on the issuer’s allowlist and transfer-agent systems, and regulatory changes that could affect how tokenized funds are offered. Since shares cannot be sold on open markets like Bitcoin, exit liquidity depends on the redemption process rather than on a public order book. Unlike a payment stablecoin such as Tether, USTB is an investment product and is not designed for everyday payments.

Outlook

The future of USTB is closely tied to the growth of the tokenized Treasury market as a whole. Rising institutional interest in on-chain yield, the entry of large asset managers like Invesco, and the spread of Treasury-backed collateral across DeFi all point toward continued expansion. If tokenized funds keep gaining regulatory clarity and wider blockchain support, USTB could serve as a reference example of how a traditional fixed-income product can operate natively on public networks. For readers tracking the sector, the key things to watch are the fund’s assets under management, its multi-chain rollout, new DeFi integrations, and any additional products Invesco and Superstate launch on the same infrastructure. You can follow related coverage and other real-world asset projects across our cryptocurrency directory.