Mumbai, Dec. 8 -- Tube Investments of India Ltd dropped for a fifth straight session today. The stock is quoting at Rs 2585, down 3.06% on the day as on 13:19 IST on the NSE. The benchmark NIFTY is down around 0.7% on the day, quoting at 26004.2. The Sensex is at 85175.61, down 0.63%.Tube Investments of India Ltd has eased around 13.26% in last one month.Meanwhile, Nifty Auto index of which Tube Investments of India Ltd is a constituent, has increased around 2.84% in last one month and is currently quoting at 27939.1, down 1.13% on the day. The volume in the stock stood at 1.84 lakh shares today, compared to the daily average of 3.26 lakh shares in last one month. The benchmark December futures contract for the stock is quoting at Rs 2592...