South Korea's won rose the most in three weeks on speculation the US will push back interest-rate increases and as policy makers in Europe add stimulus.

Global funds bought more South Korean stocks and bonds than they sold this week. US industrial output slipped more than economists had projected in March, with the Federal Reserve examining data to determine the best time to raise borrowing costs. European Central Bank President Mario Draghi reaffirmed plans for buying bonds through September 2016 after a policy review on Wednesday, boosting demand for emerging-market assets.

The won rose 0.8 percent to 1,088.72 a dollar as of the 3 pm close in Seoul, data compiled by Bloomberg show. That's the biggest increase since March 24.