The import price index declined 1.1 percent in August from a month earlier, after sliding 0.8 percent in the previous month, according to the Bank of Korea (BOK).
Price for imported raw materials slumped 3.5 percent on lower price for mining products. Intermediate goods price fell 0.3 percent on lower chemical product price that offset higher price for coal and oil products.
Imported capital goods price gained 0.2 percent, but consumer goods price retreated 0.6 percent in the month.
The export price index dipped 0.2 percent in August from a month earlier, marking the first decline in four months.
Price for exported farm goods added 0.1 percent, but price for industrial products reduced 0.2 percent.