Stock market crash, Oct. 1 -- Following the escalation in US-Iran tensions, key Indian stock market indices extended their morning losses. US bond yields and crude oil prices bounced back strongly from today's lows after the fresh escalation in Middle East tensions, following US President Donald Trump's hint at a fresh strike in Iran.

The Nifty 50 index has tumbled around 250 points, while the BSE Sensex has lost over 900 points. The Bank Nifty index is also trading in red, losing more than 0.30%. In this fresh crash, the Nifty 50 index has decisively crashed below the 22,500 support, while the BSE Sensex has come below the 71,800 support.

The US 10-year bond yield has bounced back from today's lower levels, gaining over 0.75%. The US 3...