Both Sensex and Nifty opened negative on Tuesday after US, Iran failed to reach a ceasefire agreement. Iran turned down a US proposal for a ceasefire, instead sending back a ten-point response that calls for a permanent end to the war. At the open, Sensex fell 650 points was NSE Nifty50 was down 215 points. Earlier, the GIFT Nifty suggested that the benchmark Nifty50 index may decline as oil prices remained high due to tension in the Middle East.