Sensex plunged over 1,000 points and Nifty fell over 300 points during intraday trade on Monday. The crash was driven by several factors, including Trump rejecting Iran's response to peace proposal and Brent crude surging 4% to $105.5/barrel. Other facts included rupee weakening to 94.88 against the dollar, PM Narendra Modi's fuel conservation call and rising US bond yields.