On April 17, OKEx issued a notice stating that as the OKExBSV US dollar index exchange Binance will trade off the BSV on April 22, 2019 at 18:00 (HKT), we will adjust the composition of the BSV USD index in the near future. On April 19, 2019 (Friday), at 16:30 pm (HKT) after contract settlement, the Bitfinex BSV/BTC and Poloniex BSV/BTC trading pairs were added to the BSV USD index component, and the Binance BSV/BTC trading pair was eliminated. Recently, the price of BSV has fluctuated greatly. At the same time, during the adjustment of index components, the price of BSV USD index and the marked price may be beating. Please reduce the actual leverage multiples, reduce the position, and increase the margin in advance to control the risk.