About BitMEX's Products
All the products listed on BitMEX's exchanges are Bitcoin-denominated CFDs (Contract for Difference). Each transaction is settled and closed with Bitcoin. Because of this tax@cryptact determines the profit and loss for each closed contract position by its impact (increase or decrease) on account margin balances. Profit/Loss calculations are possible in this manner but the products themselves (i.e. BitMEX's perpetual futures) will not show up in your ledger summary.
Each increase in your account margin balance is treated as an increase where profit/loss is realized at the point of the transaction (similar to an airdrop or bonus). Decreases are calculated through a disposal at zero price (sell at zero).
When you download files from BitMEX both the timezone and timestamp format are set to your system locale. Because it is vital that correct timestamps be reflected for BitMEX transactions (since each margin account increase/decrease relies on lookup prices), please ensure that your set you timezone correctly in the upload dialog when uploading your files.
1. Click Account in the title bar
2. Select Balances from the menu
3. Click Save as CSV