Likely what Here4Money said. Chart shows it was in a downtrend since Feb, no make that since Oct of last year. Someone must have known fine was coming and sold. Now that that is out of the way "they" are jumping back in. Sometimes stocks actually go up on good news and down on bad stuff. When they don't, there is always a reason when you dig into it.
CCP had talked of dismantling on antitrust accusations it if I recall, a fine means BABA survives. It was prolly all written when they disappeared Jack.
China extends crackdown on Jack Ma's empire with enforced revamp of Ant Group ........... "The overhaul, in the works for several months, includes Ant turning itself into a financial holding firm, a move expected to curb its profitability and valuation by curtailing some of its freewheeling businesses." .......... https://www.reuters.com/article/us-...th-enforced-revamp-of-ant-group-idUSKBN2BZ134