The benchmark KOSPI index is displayed on a screen in a dealing room of Hana Bank headqaurters in Seoul, Friday. Yonhap

Korean stocks opened sharply higher Friday following reports that the United States and Iran have reached an agreement to extend the current ceasefire.

The benchmark Korea Composite Stock Price Index (KOSPI) added 217 points, or 2.65 percent, to 8,402.29 in the first 15 minutes of trading.

The index fell 0.53 percent Thursday after closing over the 8,200-point level two days prior.

Investors were boosted by overnight reports that Washington and Tehran had agreed to a memorandum of understanding to extend a ceasefire for 60 days and resume talks on Iran's nuclear program.