Goldman Sachs Group an American multinational Investment bank and financial services conglomerate sold (liquidated) their investments worth $10.5 Billion US Dollars as part of the block deal over the Friday trading session. Over $35 Billion worth of money was wiped out a majority of the selling happen in the bellwether stocks predominantly coming from Chinese technology large companies in the U.S. Baidu, Discovery, TME and ViacomCBS are amongst the companies who faced the burnt.
You may be interested in learning more about some of the relevant information
What is Bellwether stock?
What is a Block Deal?