Meta Platforms Inc (META.O), which is scheduled to report after markets close on Wednesday, was trading 4% lower.
Amazon.com Inc (AMZN.O) and Apple Inc (AAPL.O), both due to report on Thursday, were down about 4% and 1%, respectively.
While most Big Tech stocks have edged higher in the past few weeks, overall it has been a bleak year for the sector.
Netflix, Meta, Amazon, Microsoft, Alphabet and Apple have already lost a combined $2.5 trillion in market value so far this year.
read moreReporting by Yuvraj Malik and Akash Sriram in Bengaluru; Editing by Saumyadeb ChakrabartyOur Standards: The Thomson Reuters Trust Principles.