According to Golden Finance, ACT and other Meme tokens plummeted today. User @YeriZhang analyzed that it seems that Binance has changed the rules of contract holding upper limit and multiples. The long positions of MMs whose contracts are the main battlefield are actively closed, resulting in the price difference of spot contracts that has exploded, and other robots have arbitrage, and the spot price has been smashed. Previously, Binance announced that it would adjust the leverage and margin ladder of multiple U-standard perpetual contracts such as 1000SATSUSDT and ACTUSDT.