South Korea posted a trade deficit 1. 7 billion U.S. dollars in the first 20 days of October, the Korea Customs Service said Wednesday. Rhe Korea Customs Service (KCS) said the deficit came as imports, which dipping 18.6 percent on year to 19.7 billion U.S. dollars, marked a faster decline than exports, decreasing 15.7 percent to 18 billion U.S. dollars, the KCS said. The customs office, however, forecast that export growth is likely to stand back in black territory in the last two months of the year despite of local currency movements, oil prices and global economic conditions. So far this year, the country posted a trade surplus of 29.1 billion U.S. dollars, with exports contracting year-on-year to 278. 7 billion U.S. dollars and imports falling 32.1 percent to 249.7 billion U.S. dollars, according to the agency. 