South Korea's exports fell 8.7 percent in the first 10 days of this month from a year earlier due to decreased business days, the latest customs data showed Monday.

Total outbound shipments reached $12.3 billion from Sept. 1-10, down from $13.5 billion tallied over the same period last year, according to numbers compiled by the Korea Customs Service.

South Korea's largest port of Busan. (Yonhap)
South Korea's largest port of Busan. (Yonhap)

The drop came as there were seven business days during the 10-day period, compared with the previous year's eight.

Exports of semiconductors continued the rally this month to surge 42.9 percent on-year, while those of petroleum products and passenger cars rose 15 percent and 13.7 percent, respectively.

Overseas sales of South Korea-made wireless devices sank 18.7 percent and exports of auto parts slumped 37.6 percent in the same period.

By country, exports to China retreated 2.8 percent over the 10-day period from a year earlier amid Beijing's retaliatory moves against Seoul's plan to deploy a US missile defense system on its soil.

Shipments to the United States also fell 5.2 percent, and those to the European Union edged down 0.7 percent on-year.

Meanwhile, imports contracted 3.4 percent on-year to $11.9 billion during the same period, with a trade surplus totaling $400 million.

Exports of Asia's fourth-largest economy have been on a roll since November last year on the back of recovering world trade and rising oil prices. (Yonhap)