Upcoming Upgrade to Our Margining System and API

BitMEX will gradually move all users’ trading accounts to the new system from 25 March 2024 onwards. Users will not need to take any action to be migrated, but they should be aware of these important changes to the API and cross margining system as a result of this upgrade. For our API users, we encourage you to test any trading software in our Testnet environment. Changes to Cross Margining SystemWe have further made updates to how our Cross Margining system works, helping to improve capital efficiency (and allow users to trade more):Unrealised PnL can now be shared between positions in cross margin. Under cross margin, all cross margin positions for an account would be liquidated at the same time.