According to CoinMeta, Binance will enable the last transaction price protection mechanism for the perpetual contract of bullausdt on October 28th at 14:00. During the protection period, the marked price will be calculated based on the recent average transaction price of the contract, with a maximum change of about ±1% per second, and the maximum funding fee rate will be adjusted to ±0.005%. This mechanism will continue until the spot price of bulla converges and a stable index price is formed.