Understanding flexUSD


What is flexUSD?

flexUSD is America’s first interest-earning stablecoin that allows holders to earn interest 3 times a day (every 8 hours). Users can convert US Dollars for flexUSD and redeem 1:1 at any time.


Who Should Use flexUSD?

flexUSD is for anyone who wants to:

  • Earn interest passively
  • Participate in crypto without being exposed to market volatility
  • Find an alternative way to invest savings

flexUSD has been paying between 5-17% APY*, compared to the 0.06% APY national average interest rate for savings accounts
*Monthly average annual percentage yield from 1/1/2021 to 12/31/2021.


How Does flexUSD Earn Interest?

Borrowing and lending activity drives a lot of crypto trading. Many crypto traders have an appetite to borrow assets, especially U.S Dollars, to fund trades. These professional traders on CoinFLEX.com use leverage to make their trading more efficient and profitable. Traders must pay interest when leveraged and keep enough assets (collateral) on the platform to ensure they always have enough money to pay back the loans, otherwise their assets are sold on the market.

CoinFLEX* offers a peer-to-peer market for borrowers and lenders. When users mint flexUSD, they are earning interest from the dollars (USDC) being deposited into this market. flexUSD holders are paid interest 3 times a day (every 8 hours).

*CoinFLEX.com is not available to US residents, including CoinFLEX US users.


How is the flexUSD rate determined?

The interest rate paid by the borrower determines the variable interest rate flexUSD holders earn. flexUSD holders are paid 3 times a day (every 8 hours) on-chain. flexUSD holders receive 90% of the profits CoinFLEX earns on the funds deposited in CoinFLEX.com’s peer-to-peer borrow and lending market.
What APY Can I Expect to Earn with flexUSD?

Throughout 2021, flexUSD mainly experienced an APY between 5-17% and its lifetime average is 10.7%.


How Does flexUSD Differ From Other Stablecoins?

Other stablecoin issuers pay holders 0% interest. Users are typically required to lend out assets to a crypto lending platform in order to earn meaningful interest on their stablecoins.

flexUSD allows users to earn interest simply by holding the stablecoin in a CoinFLEX.US wallet or even by self-custodying in cold storage!


Is There a Minimum Amount Required for Minting flexUSD?

Yes, there is a $10 minimum.


What Blockchains Support flexUSD?

flexUSD is an ERC20 token and also on the BCH network via SLP (simple ledger protocol) & SmartBCH (SEP20). We will soon be adding flexUSD across all other chains as we want the tokens to be chain agnostic e.g. TRC20, EOS, Polkadot and others.


So Where’s the Second Source of Yield?

flexUSD can be taken off platform and deployed on DeFi lending platforms allowing you to earn further interest from yield farming.


What are the Smart Contracts?

Ethereum (ERC20):

Bitcoin Cash (SLP):

SmartBCH (SEP20):


Is There a Fee to Redeem flexUSD?

flexUSD can be redeemed for free three times per day. If you would like to instantly redeem flexUSD, you can do so for a small fee, which is the total interest of the previous two interest payment windows. This information displayed on the flexUSD redeem page is based on the current interest rates.


How Do I Mint flexUSD? Is It Easy?

Yes! It’s extremely easy, just enter the flexUSD page on coinflex.us and follow the following steps.
Step 1: Select “Mint”
Step 2: Select the asset you want to mint
Step 3: Enter an amount
Step 4: Click “Confirm” and you will receive a confirmation message at the top of the screen.


When Can I Redeem flexUSD and How Do I Do That?

You can redeem your flexAsset at any time for the native asset but it will be processed and credited at the next auction cycle. Our repo auctions are at 12pm UTC, 8pm UTC and 4am UTC.



  1. Borrow coin: USD only;
  2. Cannot be less than the minimum amount of 10 USD, and cannot exceed the max borrow, which is calculated by the formula below. 


Where Can l View the History Record?

You can view your records in the Asset History page by clicking the “View History” or the “flexAssets” under the “Wallet & Order”.