The Hang Seng retreated 0.9 percent in the open.
Shanghai’s composite index opened at plus 0.1 and Shenzhen was up by as much.
Hong Kong’s financial regulator said on Monday that the financial and trading metropolis’s local banking sector’s exposure to struggling Credit Suisse is “insignificant”.
According to the authority, the total assets of Credit Suisse’s Hong Kong operations represent less than 0.5 percent of the total assets of Hong Kong’s banking sector.