Binance will adjust the BITOUSDT perpetual contract size on November 19th, with an adjustment factor of 0.5. Binance Futures announced that due to a reverse stock split (1 share for 0.5 shares) of the ProShares Bitcoin ETF (BITO), the underlying asset of the BITOUSDT perpetual contract, Binance will adjust the contract size of the BITOUSDT USDT U-margined perpetual contract at 09:00 Beijing time on November 19, 2026, expected to be completed by 11:30. The adjustment factor is 0.5. After the adjustment, the contract will enter a cancellation-only phase for a maximum of 5 minutes.