Mumbai, Jan. 23 -- Tata Consultancy Services Ltd gained for a third straight session today. The stock is quoting at Rs 3186.2, up 1.14% on the day as on 12:49 IST on the NSE. The benchmark NIFTY is down around 0.31% on the day, quoting at 25210.75. The Sensex is at 82029.72, down 0.34%. Tata Consultancy Services Ltd has slipped around 4% in last one month. Meanwhile, Nifty IT index of which Tata Consultancy Services Ltd is a constituent, has slipped around 1.45% in last one month and is currently quoting at 38301.75, up 0.28% on the day. The volume in the stock stood at 11.13 lakh shares today, compared to the daily average of 27.23 lakh shares in last one month. The benchmark January futures contract for the stock is quoting at Rs 3190.3...