U.S. stock index futures were flat on Wednesday as investors weighed the impact of supply chain constraints and inflation on corporate earnings, while Netflix shares remained sluggish after its quarterly report. Netflix’s global sensation “Squid Game” helped lure more customers than expected, the world’s largest streaming service said as it predicted a packed lineup would further boost signups through the end of the year. Its shares, however, fell 2.7 percent after hitting a record high earlier this month and gaining 18.2 percent year-to-date. Analysts expect S&P 500 earnings to rise 32.4 percent from a year earlier, according to Refinitiv data, while also keeping a close eye on growth outlook from companies that are faced with rising costs, labor shortages, and supply chain disruptions. “Investor response to the latest set of earnings reports has been a touch hit and miss with supply chain issues dogging both Procter and Gamble and Philip …