U.S. stock index futures fell in early Asian trading as Alphabet and Tesla's share prices dropped after releasing their earnings reports.

US stock index futures fell in early Asian trading on Thursday, with concerns about high capital expenditures heightened by technology giants' earnings reports. S&P 500 index futures dropped by 0.2%, while Nasdaq 100 index futures fell by 0.2%. Alphabet fell by over 3% in after-hours trading as the company once again raised its capital spending estimate for this year, possibly exceeding $200 billion, higher than analysts' expectations. Tesla's stock price plummeted by over 4% in after-hours trading as the company's second-quarter profits fell far short of Wall Street expectations, with operating costs soaring.