Indian markets open higher; Sensex gains over 200 points, Nifty above 23,300 amid falling oil prices

Mumbai, Sept. 23 -- Indian benchmark indices opened in positive territory on Wednesday with Sensex surging over 200 points and Nifty hovering above 23,300 amid falling oil prices.Both the indices opened with a gap-up; Nifty opened higher at 23,352.15 against the previous close of 23,329 and was tra…