According to @EmberCN, an address holding a large amount of ETH under Jump Trading transferred out 324,000 ETH (about 593 million USD) last night. The address has been losing ETH since it held a maximum of 2.05 million ETH in September last year. The current holding has dropped to 1.31 million ETH, and the most recent transfer was 110,000 ETH on February 11 this year.