Hong Kong's exports surprisingly declined 2.8 percent in October from a year ago, the government said.
The 10 economists' median estimate for exports was for a 6.2 percent increase in October, according to a Bloomberg survey.
Imports rose 3.3 percent year-on-year. That compared with the median 9.5 percent increase of 10 economists' estimates.
The city posted a trade deficit of HK$42.7 billion in the month, compared with an estimated HK$36 billion deficit.