Shares of rate-sensitive Tesla Inc TSLA.O, Amazon.com AMZN.O, Meta Platforms META.O, Alphabet Inc GOOGL.O and Microsoft Corp MSFT.O also dipped between 0.1% and 0.6% in premarket trading. By Ankika Biswas and Shreyashi Sanyal Sept 30 (Reuters) - U.S. stock indexes were set to fall at the open on Friday as resilient core inflation in August stoked fears of more big-sized interest-rate hikes denting a rebound in consumer spending. Wall Street has faced heavy losses in a tumultuous month on concerns of an economic downturn fueled by the Federal Reserve's aggressive push to curb soaring prices.