Mumbai, Sept. 3 -- RBL Bank Ltd gained for a third straight session today. The stock is quoting at Rs 408.8, up 4.98% on the day as on 12:49 IST on the NSE. The benchmark NIFTY is down around 0.02% on the day, quoting at 23909.75. The Sensex is at 76617.18, up 0.06%. RBL Bank Ltd has risen around 7.42% in last one month. Meanwhile, Nifty Private Bank index of which RBL Bank Ltd is a constituent, has risen around 0.13% in last one month and is currently quoting at 27606.8, up 0.79% on the day. The volume in the stock stood at 146.45 lakh shares today, compared to the daily average of 22.17 lakh shares in last one month. The benchmark September futures contract for the stock is quoting at Rs 410.7, up 4.76% on the day. RBL Bank Ltd is up 53...