# UMIP 28 -Add STABLESPREAD as a price identifier

**URL:** <https://discourse.uma.xyz/t/umip-28-add-stablespread-as-a-price-identifier/1439>\
**Category:** technical UMIPs\
**Created:** [March 2, 2022, 1:00pm UTC](https://discourse.uma.xyz/t/umip-28-add-stablespread-as-a-price-identifier/1439 "2022-03-02T13:00:10Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![Mhairi](https://yyz2.discourse-cdn.com/flex032/user_avatar/discourse.uma.xyz/mhairi/32/48_2.png) [@Mhairi](https://discourse.uma.xyz/u/Mhairi)\
**Post date:** [March 2, 2022, 1:00pm UTC](https://discourse.uma.xyz/t/umip-28-add-stablespread-as-a-price-identifier/1439/1 "2022-03-02T13:00:10Z")

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The DVM should support price requests for the STABLESPREAD price index, denonominated in ETH. STABLESPREAD is defined as: `min(max(A - B + 1, 0), 2)` , where `A` refers to an equally weighted basket of {UST, CUSD, BUSD}. B is an equally weighted basket of {USDC, USDT}. UST is TerraUSD, the interchain stablecoin connected by the Cosmos IBC. CUSD is Celo Dollar, the stablecoin on the Celo network. BUSD is Binance USD, a stablecoin issued by Paxos in partnership with Binance. `USDC` is a centralized stablecoin issued by Circle and Coinbase. `USDT` is a non-transparent centralized stablecoin issued by Tether, currently the most used stablecoin on Ethereum.

> <https://github.com/UMAprotocol/UMIPs/blob/master/UMIPs/umip-28.md>