"Goldman Sachs and Morgan Stanley have reportedly sold $19 billion worth of shares in Chinese tech and US media companies. Traders are now wondering what caused the unusually massive move and whether it will continue next week. "

“I’ve never seen something of this magnitude in my 25-year career,” portfolio manager at Swiss-based Bellevue Asset Management AG, Michel Keusch, told Bloomberg.

https://www.rt.com/business/519419-wall-street-banks-block-trades/