The Stock Market opened on a negative note today, with Sensex declining by 591.21 points and Nifty by 183.55 points in early morning trading session. Experts attribute this dip to the ongoing tension in the Middle East after Israel's attack on Iran, which is expected to increase oil prices and inflation worldwide. In the pre-open market, BSE Sensex traded at 71,999.65 while Nifty50 traded at 21,861.50. In the midst of this, ONGC, Apollo Hospital, Cipla, ITC, and Dr. Reddy were the top gainers while BPCL, HDFC Life, Bajaj Auto, Infosys, and Coal India were the top losers. Investors are advised to carefully consider all factors before making any investment decisions.