The March Nifty futures is trading at a discount of one point to the spot Nifty at 3317. The April Nifty is at 3308 - a discount of 10 points, and the May Nifty is at 3303 - discount of 15 points.The open interest in March futures is marginally up by 99,700. The April series has added 37,82,900 in the open interest and May has added 6000.IVRCL Infrastructure is the most actively traded stock futures. The March futures is at Rs 1,497, a preimum of Rs 3 to the cash price. Tata Steel is trading at Rs 4 premium at Rs 517, and SBI is trading at Rs 4 premium at Rs 996.The Sensex is up 123 points at 11,073. The Nifty has gained 38 points at 3318.