Mumbai, May 30 -- COMEX Copper futures tested around one-week low in volatile trades. Overall mood was supported on reports highlighting fresh diplomatic progress aimed at easing tensions between the United States and Iran. COMEX Copper futures ended marginally for the week at $6.40 per pound. However, the metal is up around 7% for the month as the US stocks extended their record-setting rally amid strong earnings. Meanwhile, the global copper market moved into a large surplus during the first quarter of 2026, according to preliminary data from the International Copper Study Group's May 2026 Copper Bulletin. World mine production was largely unchanged for the quarter. A 1.1% decline in concentrate output was offset by a 3.3% increase in sol...