Sensex tumbles 733 points amid broad-based selloff; Nifty slips from recordFrom the Sensex basket, Larsen & Toubro, Maruti, Reliance Industries, Nestle, Bharti Airtel, UltraTech Cement, Kotak Mahindra Bank and JSW Steel were among the major laggards. Bajaj Finance climbed nearly 1 per cent higher.