The aggregate balance - the key gauge of cash in the banking system - will increase to HK$84.713 billion on April 29, a HKMA spokesman said. The Hong Kong dollar is pegged to the greenback at 7.75 to 7.85 per U.S. dollar.

($1 = 7.7500 Hong Kong dollars)

(Reporting by Twinnie Siu and Donny Kwok, editing by Louise Heavens)