South Korean oil-refining stocks rose early on the 4th as international crude prices continued advancing amid clashes between the U.S. and Iran. S-Oil shares climbed 10.01% to 162,700 Korean won by 9:18 a.m. on the Korea Exchange, while SK Innovation gained 4.51% to 136,700 Korean won and KOSDAQ-listed Hung-gu Oil rose about 2%. U.S. Vice President JD Vance said on the 3rd local time that Washington would not engage in dialogue with Iran unless it stopped attacking commercial vessels. He cited economic, military and diplomatic measures as possible additional means of pressure, while leaving the choice of action to U.S. President Donald Trump. Overnight, October-delivery WTI crude futures rose 0.32% to $91.3 a barrel for a fourth straight session of gains, while November-delivery Brent crude settled 0.12% lower at $95.52.