The 30-share BSE Sensex pack slumped 809 points or 0.98 per cent to close at 81,688 and the broader NSE Nifty index moved 236 points or 0.93 per cent down to end at 25,015. At today's closing levels,

The combined market capitalisation of companies listed on the Bombay Stock Exchange (BSE) has shrunk to Rs 461.26 lakh crore, marking a loss of Rs 15.9 lakh crore.

The Sensex dropped nearly 1,800 points due to the growing conflict in West Asia, causing a big loss in investor wealth. Concerns over increasing tensions between Iran and Israel, slow GST growth, and foreign investors moving money to China contributed to the market's decline.

India's BSE will retain weekly derivative contracts linked to the Sensex after the country's markets regulator announced tighter rules for equity derivatives, two sources with direct knowledge of the matter said.

On October 3, the BSE announced the discontinuation of weekly index derivatives contracts on the SENSEX 50 from November 14, and on the BANKEX from November 18. This decision follows recent guidelines from SEBI aimed at strengthening the equity index derivatives framework to improve investor protection and market stability.

Sources have told ET NOW that the BSE will retain weekly derivative contracts linked to the Sensex. This follows SEBI's tighter rules for the Futures and Options (F&O) trading.