Mumbai: Equity benchmark indices Sensex and Nifty tumbled in early trade on Monday tracking extremely weak US market trends, incessant foreign fund outflows and concerns over US tariffs. The 30-share BSE benchmark Sensex tanked 567.62 points to 74,743.44 in early trade. The NSE Nifty dropped 188.4 points to 22,607.50. From the Sensex pack, HCL Tech, IndusInd Bank, Zomato, Tech Mahindra, Tata Consultancy Services, ICICI Bank, HDFC Bank and Power Grid were among the biggest laggards. Maruti a