A direct manual trade of 2.66 million shares of ISHARES A50 (02823) was registered at 3:53p.m.
The deal amounted to HK$36.32m, or at HK$13.635 per share, 2.9% lower than previous close.
ISHARES A50 is now trading down 2.92% to HK$13.63, with 7.79 million shares of HK$106.85m changing hands.