According to Wu, the perpetual contract DEX Aster tweeted that the S3 buyback program is nearing completion, with a total of 49,299,999 USDT spent on buybacks and a total of 47,065,447 ASTER tokens repurchased. Aster also announced that the S4 buyback program will begin soon, with details on buyback fee allocation, dates, and addresses to be released shortly.