The eighth and latest batch of iBond offered by the government has drawn a record response.
A government spokesman said according to preliminary figures, total subscription amount reached HK$54.5 billion.
The target issuance size is HK$15 billion.
Preliminary figures also showed the number of applicants jumped 55 percent from a year ago to 717,000.
Both the subscription amount and number of applicants, if confirmed, will be all-time highs.
The subscription period ended on Friday.
And because of the strong response, the spokesperson expects the government to expand the tranche to HK$20 billion.
Bond holders will be paid interest at a rate linked to inflation in Hong Kong, subject to a minimum rate of 2 percent.
The iBond will be issued on June 23 and listed on the stock exchange the following day.