The South Korean won weakened further against the U.S. dollar on Thursday, driven by sustained selling of local equities by foreign investors.

The currency's decline marks a continuation of the pressure that has plagued the won in recent sessions, with overseas funds remaining the primary source of outflows from the Korean market.

This latest depreciation extends a severe downtrend for the currency.

The won has tumbled to its weakest level against the greenback in 17 years, a significant deterioration in its standing that reflects broader risk-off sentiment and capital flight from emerging markets.

The steady exodus of foreign capital from Korean stocks has left the currency vulnerable to further downside pressure.

Market participants are closely monitoring the pace of foreign selling, which has been a key driver of the won's volatility.