The mark price takes into account both the spot index price and the moving average of the basis.

Fixed-margin mode: Margin ratio = (fixed margin + UPL) / initial margin Cross-margin mode: (Balance + RPL + UPL) / (position margin + withheld margin for working orders) 3.Clearing Without Mark Price: Clearing price = the last trading price at 09:00 every Friday (CET, UTC +1) With Mark Price: Clearing price = Mark Price at 09:00 every Friday (CET, UTC +1) 4.API Users may user V3-WebSocket Mark Price channel to obtain the latest Mark Price.

Margin mode of single currency account Profit and loss Long margin with base crypto, PnL is quoted with base crypto (using Mark price and Last price) Mark price PnL = Assets in position - (Debt + Interest) / Mark price Last price PnL = Assets in position - (Debt + Interest) / Last price Long margin with quote crypto, PnL is quoted with quote crypto (using Mark price and Last price) Mark price PnL = Assets in position * Mark price - (Debt + Interest) Last price PnL = Assets in position * Last price

Call options’ seller: Position margin = [max (0.1, 0.15 - OTM value / same expiry futures mark price) * margin factor + options mark price] * contract multiplier * amount of positions = [max (0.1, 0.15 – 100 / 5900) * 1.02 + 0.0575] * 0.1 * 50 = 0.96606 BTC (3) Put options’ seller:Position margin of BTCUSD and ETHUSD options = [max (0.1 * (1 + options mark price), 0.15 – OTM value / same expiry futures mark price) * margin factor + options mark price] * contract multiplier * amount of positions Example

value * |number of contracts| * mark price * (maintenance margin ratio + fee rate)]

Margin × indexPrice) Buy to Close positions (Short)² Max (Order Price - Position IMR, 0) Max (Order Price - Position IMR, 0) MMR MMR (Long) N/A¹ N/A¹ MMR (Short Call) c * Margin Factor + Mark Price c * Margin Factor * index price + Mark Price MMR (Short Put) max(c, c * Mark Price) * Margin Factor⁴ + Mark Price max(c * index price, c * Mark Price) * Margin Factor⁴ + Mark Price Index Coin-Margined BTCUSD Coin-Margined ETHUSD USDⓈ-margined BTCUSD USDⓈ-margined ETHUSD a 0.1 0.1 0.1 0.1 b 0.15 0.15 0.15

Options value Options value = total positions * mark price * contact multiplier * contract value P&L Unrealized profit or loss of current position P&L = (mark price - avg. open price) * total positions * contract multiplier * contract value P&L ratio P&L of long positions = (mark price – avg. open price) / avg. open price P&L of short positions = (avg. open price - mark price) / avg. open price Initial margin The initial margin for long positions is 0.

smaller of the two mark prices.

USDT-margined contracts Buy order loss: Abs (Contract size × |Number of contracts| × Multiplier × Min [0, (Mark price – Order price)]) Sell order loss: Abs (Contract size × |Number of contracts| × Multiplier × Min [0, (Order price – Mark price)]) Crypto-margined contracts Buy order loss: Abs (Contract size × |Number of contracts| × Multiplier × Min [0, (1 / Order price – 1 / Mark price)]) Sell order loss: Abs (Contract size × |Number of contracts| × Multiplier × Min [0, (1 / Mark price – 1 / Order

Margin requirement for positions Crypto-margined contracts Initial margin = Contract size × |Number of contracts| × Multiplier / (Mark price × Leverage) USDT-margined contracts Initial margin = Contract size × |Number of contracts| × Multiplier × Mark price / Leverage The initial margin fluctuates based on the mark price in cross-margin mode.

price Long position using quote crypto as margin Floating PnL = assets * mark price - |liability + interest| Short position using base crypto as margin Floating PnL = assets / mark price - |liability + interest| Short position using quote crypto as margin Floating PnL = assets - |liability + interest| * mark price In the old isolated margin mode Long position using base crypto as margin Floating PnL = assets - |liability + interest| / mark price - margin Short position using quote crypto as margin

The position's entry price is 100,000 USD and the mark price is 160,000 USD. Long positions PnL: = Face value x |Size| x Multiplier x（Mark price - Entry price） = 0.01 x 10 x 1 x (160,000 - 100,000) = 6000 USDT Coin-margined contracts: Suppose you hold a short BTC-USD expiry futures position, the contract face value is 100 USD, contract multiplier is 1, size is 1000 contracts. The position's entry price is 100,000 USD and the mark price is 80,000 USD.

BTCUSD-200327-20000-P Mark Price PA delta BS delta 1.8571 BTC -2.85702309 -0.99993983 Quarterly BTCUSD0327 Mark Price delta 7,000 0.01428571(=100/7,000) The number of futures contracts calculated by using PA delta for hedging is: The number of futures contracts calculated by using BS delta for hedging is: A positive number indicates a buy, and a negative number indicates a sell.

pos Options value If the unit for calculating the price is crypto, then options value = total positions * mark priceIf the unit for calculating the price is the number of contracts, then options value = total positions * mark price * multiplier optVal Floating PnL Unrealized profit or loss of current position Floating PnL = (mark price - avg. open price) * total positions * multiplier upl Floating PnL % Floating PnL % = (mark price – avg. open price) / avg. open price Floating PnL % = (avg. open

Instead, the entrusted price will be calculated based on current market depth, basis, and mark price to increase transaction efficiency and return to cover the loss.3.Inquiry for Liquidated Positions and Margin Call Loss a.After the price change, some positions may be transacted at lower prices than their bankruptcy prices(for closed long positions) or higher(for closed short positions).