India, Sept. 28 -- The Indian stock market witnessed a sharp sell-off on Monday, with the Sensex dropping more than 900 points within the first hour of trading and the Nifty 50 slipping below 23,000.

The decline came after both benchmark indices had already recorded their seventh consecutive weekly fall. A combination of rising crude oil prices, elevated US bond yields, foreign investor selling and broader geopolitical concerns has added to the pressure on domestic equities. By 10:15 am, the combined market value of BSE-listed companies had fallen by around Rs 4.9 lakh crore, from approximately Rs 4,82,16,004 crore at the opening to Rs 4,77,19,611 crore.

Here are the major factors behind Monday's market decline.

1. Crude Oil Crosses $1...