Mumbai, Aug. 18 -- Tata Motors Ltd gained for a fifth straight session today. The stock is quoting at Rs 677.05, up 1.87% on the day as on 12:44 IST on the NSE. The benchmark NIFTY is up around 1.11% on the day, quoting at 24905.35. The Sensex is at 81350.68, up 0.93%. Tata Motors Ltd has slipped around 1.51% in last one month. Meanwhile, Nifty Auto index of which Tata Motors Ltd is a constituent, has slipped around 4.74% in last one month and is currently quoting at 24118.8, up 4.46% on the day. The volume in the stock stood at 99.69 lakh shares today, compared to the daily average of 106.76 lakh shares in last one month. The benchmark August futures contract for the stock is quoting at Rs 679.35, up 2.16% on the day. Tata Motors Ltd is ...