Stock market today: Nifty was below 24200 on opening, while Sensex traded at 77,309.84, 0.077 per cent down, at around 9:25 am.Prefer HTon Google Benchmark equity indices Sensex and Nifty opened lower on Tuesday, August 25, amid intensifying geopolitical tensions, primarily due to the fresh US sanctions on Iran. Nifty was below 24200 on opening, while Sensex traded at 77,309.84, 0.077 per cent down, at around 9:25 am.The Bombay Stock Exchange (BSE) building, back, in Mumbai (Bloomberg/File)Sensex and Nifty ended lower on Monday as well amid geopolitical heat and elevated crude oil prices.Previous day's stock market bulletin Despite a positive beginning on Monday, the 30-share BSE Sensex failed to carry forward the momentum and declined 171.72 points, or 0.22 per cent, to settle at 77,369.11. During the day, it dropped 339.17 points, or 0.43 per cent, to 77,201.66, according to data cited in a PTI news agency report.The 50-share NSE Nifty slipped 32.95 points, or 0.14 per cent, to end at 24,219.05.Among the 30 Sensex firms, Adani Ports, Bharat Electronics, Bajaj Finance, Bajaj Finserv, Trent, Axis Bank, State Bank of India, and Tata Consultancy Services were among the laggards.Tata Steel, HCL Tech, Infosys, and Hindustan Unilever were among the major winners.Brent crude, the global oil benchmark, dropped 1.68 per cent to USD 92.80 per barrel.Follow the latest breaking news, major developments and agenda-setting stories from India and around the world with the newsdesk at Hindustan Times. Operating round the clock, the desk brings together experienced editors, reporters and correspondents to deliver fast, accurate and contextual reporting across subjects that influence public policy, governance, business, society and international affairs.