That boosted the measure 1.9% higher after two days of declines.
Investors found comfort in improvement to the US ISM manufacturing new orders gauge, according to Seo Sang-young, a strategist at Mirae Asset Securities.
The measure, which moved into expansion territory for the first time in eight months, serves as an indicator for the country’s exports.
See also: South Korean regulator opposes legal changes sought by stock investors to address ‘Korea discount’
Chart: Bloomberg