Copper prices gained Rs 1.10, or 0.33 per cent, to Rs 339.50 per kg in futures trade today, as speculators enlarged their positions in tandem with a firming global trend.
Trading sentiment turned bullish after copper climbed in global markets, as lower inventories and a weaker dollar buoyed the outlook for demand.
At the Multi-Commodity Exchange platform, copper for August gained Rs 1.10, or 0.33 per cent, to Rs 339.50 per kg, with an open interest of 34,269 lots.
Similarly, the metal for delivery in November-month traded marginally higher by Rs 0.95, or 0.28 per cent, to Rs 342.40 per kg, with a business turnover of 7,898 lots.
Analysts said besides, firming trend in global markets on a weak dollar, pick up in demand at spot markets led to a rise in copper prices at futures trade.
Meanwhile, copper rose 0.6 per cent to $7,285.50 a metric tonne on the London Metal Exchange.