[//]:content-type-MARKDOWN-DONOT-DELETE Gate.io is going to upgrade and optimize the USDT & BTC margin perpetual contracts from 16:00 - 17: 00 UTC on 04 July, 2023. The upgrade will take about 60 minutes and partial service will be unavailable during the process. There might be trading interruption (about 1 second) and query interruption (about 1 second) on all affected contracts during the process. If you are an affected trader and API user, please adjust your strategies beforehand. Affected services: All USDT &BTC margined perpetual contracts Major changes Changes to premium formula for the funding, replacing mark price with index price for premium formula Before Premium Index = [ Max (0 , Depth Weighted Bid Price - Mark Price) - Max (0 , Mark Price - Depth Weighted Ask Price) ] / Index Price After Premium Index = [ Max (0 , Depth Weighted Bid Price - Index Price) - Max (0 , Index Price - Depth Weighted Ask Price) ] / Index Price Please pay attention to the changes to the funding. Thank you for your understanding and continued support. Gateway to Crypto Trade over 1,400 cryptocurrencies safely, quickly and easily on Gate.io [Sign up](https://www.gate.io/signup "Sign up") to enter the crypto gateway and get 40% commission from [referrals](https://www.gate.io/referral "referrals") [Download iOS/Android App](https://www.gate.io/mobileapp?ch=ann27560 "Download iOS/Android App") right now. Reach out to us! Twitter: https://twitter.com/gate_io GateVIP Twitter:https://twitter.com/Gateio_Inst Telegram: https://t.me/gate_io API Telegram: https://t.me/gateioapi Instagram: https://www.instagram.com/gateioglobal Medium: https://gateio.medium.com/ Podcast: https://gateio.buzzsprout.com/?ch=buzzs Gate.io Team July 3, 2023