Mumbai, September 4: After ending the week with a positive spin, key Indian equity indices- BSE Sensex and NSE Nifty opened in red on Monday amid mixed global cues. The flat opening of the key domestic equities can also be attributed to North Korea’s nuclear test over the weekend. Sensex was down by over 59 points or 0.18% at 31,834.64 while the wider Nifty was down by 6 points or 0.06% at 9,968.45. The major gainers of Sensex on Monday during the early morning trade were Coal India, Cipla, Tata Motors, and Reliance. Similarly, the stocks that went down on Monday were SunPharma, Kotak Bank, Dr Reddy and Adani Ports.