Mumbai: Key Indian equity indices opened flat Tuesday as index pivotals — finance and banking stocks — witnessed selling pressure. However, oil and gas sector gained. Also Read Investors lose Rs 68,000 crore as Tata stocks slide on Chandrasekaran’s resignation 1 day ago UK PM Burnham appoints Indian-origin Gautam Rangarajan as expert adviser 1 day … Continue reading Sensex, Nifty open flat; financials in red