The March Nifty futures is trading in tandem with the spot Nifty at 3327. The April Nifty is at 3322 -down five points and the May Nifty is at 3217 - down 10 points.The open interest in March futures has gone up by 9,01,500, and 9,99,500 in the April series. The May series has added just 200 in open interest.IVRCL Infrastructure is the most actively traded stock futures. The March futures is at Rs 1,571, a preimum of Rs 4 to the cash market. Maruti is trading at Rs 5 premium at Rs 864, and Infosys is trading at Rs 2,942 - a premium of Rs 15.The Sensex is up 15 points at 11,094. The spot Nifty is at 3327 - up 35 points.