Hong Kong’s Hang Seng Index tanks to the worst single-day loss since 1997 on Monday before Tuesday’s rebound.

The tariff uncertainty fuelled global market selloff on Monday (7 April) caused nearly 1,300 callable bull/bear contracts (CBBCs) in Hong Kong SAR to knock out. Data published on Hong Kong Exchanges and Clearing (HKEX) shows some 1,296 bull CBBCs mandatorily called on Monday, with more than half tracking the Hang Seng Index (HSI). The latest mandatory call figure is a historical high, senior sources from issuing banks said, following the rapid market drop. The Hong Kong benchmark index HSI dip