Mumbai/IBNS, April 9 -- Investor confidence in the stock market weakened on Thursday as global oil prices surged amid fresh uncertainty over the US-Iran ceasefire, media reports said.

The BSE Sensex opened over 200 points lower and quickly extended losses to more than 800 points within the first hour of trade.

The NSE Nifty 50 also began the session on a weak note, slipping nearly 90 points at the open before falling over 150 points during early trade.

What triggered the fall?

The market downturn followed a sharp rebound in the previous session, as oil prices climbed to $97.35 per barrel, raising concerns over inflation and global supply disruptions.

The move came just a day after Tehran had agreed to reopen the waterway as part of a...