GET IN TOUCHloading spinner


Last Updated: April 14, 2023

Tether is fiat-collateralized stablecoin that offers individuals the advantages of transacting with blockchain-based assets while mitigating price risk. Tether is primarily issued on the Ethereum and Bitcoin blockchains and corresponds on a 1:1 basis with US Dollars sitting in bank accounts.

Background Details

Founded in July 2014 by Brock Pierce, Craig Sellars, and Reeve Collins, Tether (USDT), originally known as Realcoin, is a cryptocurrency commonly known as a stablecoin that aims to keep a fixed 1:1 exchange ratio with the U.S. dollar. Tether was one of the earliest stablecoins created, built upon Mastercoin (Omni), which was a protocol layer for Bitcoin that introduced the stablecoin concept to the world in 2012. Tether pioneered what is now known as a fiat-collateralized stablecoin model, and is now the most widely used stablecoin today.

Tether was created as an attempt to solve two major issues with existing cryptocurrencies: high volatility and convertibility between fiat currencies and cryptocurrencies. To address these perceived issues Tether created a cryptocurrency that is fully backed 1:1 by deposits of U.S. dollars held at banks. On Ethereum, USDT tokens are represented as ERC-20 tokens, while on Bitcoin, Tether utilizes the Omni layer, to represent USDT tokens. While the tokens themselves operate in a decentralized network, Hong Kong based Tether Ltd is solely responsible for creating and redeeming tokens as well as maintaining the 1:1 deposit backing.

Exchanges have been the primary users of USDT as an alternative to fiat currencies, reducing or eliminating the need to maintain outside banking relationships. Tether Ltd shares many executives and has strong ties with Hong Kong based Bitfinex with both sharing the same parent organization iFinex Inc.

Since its founding in 2014, Tether has been the subject of ongoing controversy due to the failure of Tether to provide audited financial statements proving it has adequate reserves backing USDT. Historically Tether has failed to disclose its banking relationships, only recently announcing its banking partners in November 2018 to quell rumors about its solvency raised by associated crypto exchange, Bitfinex.

In March 2019, Tether updated its disclosure statement claiming that its tokens are no longer backed 100% by U.S. dollar deposits. Tether is instead now backed 100% backed by reserves, which include traditional currency and cash equivalents and, from time to time, other assets and receivables from loans made by Tether to third parties, which may include affiliated entities.

Regulatory Details

Tether, along with parent company iFinex and related company Bitfinex, is the subject of an ongoing NYAG Investigation in connection with ongoing activities that may have defrauded New York investors that trade in virtual or “crypto” currency.

In April 2019, the New York Attorney General’s office alleged that Bitfinex, who shares the same parent company, iFinex, with Tether, used reserves from Tether to cover up $850 million in losses that were tied up in a controversial third party payments processor named Crypto Capital. Days after the NYAG’s action, Stuart Hoegner, general counsel for Bitfinex and Tether, filed an affidavit confirming that Tether was backed by only 74% cash and equivalents with the rest being equity in iFinex.

In May 2019, Bitfinex and Tether CTO, Paulo Ardoino announced Bitfinex had successfully raised $1 billion in a token sale, with proceeds used to cover the $850 million in (potentially) lost funds from Crypto Capital.

Token Usage

USDT can be transacted over Ethereum, Bitcoin’s Omni layer, EOS, and Tron in the same manner as ether, bitcoin, eos, and tron, respectively. If a user wishes to redeem USDT they can send tokens to an address controlled by Tether Ltd. who will destroy the tokens and transfer fiat currency to the user’s bank account. Tether’s existence on public blockchains allows traders and exchanges to use USDT as an alternative to fiat currencies, reducing or eliminating the need for banking relationships and outsourcing custody of fiat currencies to Tether Ltd

Supply Curve

Hong Kong based Tether Ltd. is the sole entity capable of altering the circulating supply of USDT tokens. Users create new tokens by depositing fiat currency into bank accounts operated by Tether Limited, which leads to a creation of new USDT tokens on a 1:1 reserve basis. USDT can be transacted over the Omni layer in the same manner as bitcoins. If a user wishes to redeem USDT they can send tokens to an address controlled by Tether Ltd. who will destroy the tokens and transfer fiat currency to the user’s bank account.


Tether relies on a proof-of-reserves system to ensure that reserve assets match circulating tokens. This requires a third-party to audit Tether’s bank accounts on a regular basis to show that U.S. dollar reserves are held in an amount equal to outstanding tokens. Tether uses an IOU issuance model where each USDT represents a claim for $1.00 held in the Tether’s reserves which users can redeem at any time.

On Bitcoin, USDT tokens are issued via the Omni Layer protocol, which is a protocol built as a layer over Bitcoin that allows for the issuance of tokens representing any kind of asset.

On Ethereum, USDT tokens are issued using the ERC-20 protocol standard for creating tokens on Ethereum. ERC-20 tokens include a common set of rules that define how a token can be transferred, approved, and requested.


Tether Limited is the sole entity capable of altering the circulating supply of USDT tokens. Tether issues tokens when users deposit fiat currency into bank accounts operated by Tether Limited while Tether destroys tokens when users redeem tokens for fiat currency deposits in Tether bank accounts. In order to prove that reserves exist and the system is solvent, Tether relies on a proof-of-reserves system whereby the system is fully collateralized when the number of USDT in circulation matches the value of the funds held in accounts operated by Tether Limited. Tether Limited has pledged to upload audits of its bank balances on its website to ensure transparency and prove solvency.

Tether Limited and cryptocurrency exchange, Bitfinex, share common ownership through parent company iFinex

Portions of the content on this page have been prepared by third parties not affiliated with Bullish. Bullish is not the source of or responsible for such content. Bullish is not liable for any errors or delays in updating the content to reflect new developments or market conditions or in maintaining such content or ensuring its availability. Bullish is not liable for actions taken in reliance on such content, and all use of such data is at your own risk. Material provided on this page is for informational purposes only and does not constitute investment advice. This is not and should not be interpreted as a recommendation to buy, sell, or hold a digital or fiat asset or to use a particular investment strategy. You should conduct due diligence before deciding whether to transact in any digital asset or fiat currency. Bullish makes no representation on the accuracy, suitability, reliability, or validity of any information provided. Prices displayed are for illustrative purposes only and may vary. Please see the Site Terms of Use, the Exchange Terms of Service and Risk Warnings for important additional information.

Experience a new breed of exchange.

DA Trade Background DesktopDA Trade Background Mobile

Other digital assets