Key Takeaways An artificial intelligence software powerhouse came under pressure despite a strong earnings report, while shares of a fast-food company rose after it posted strong quarterly results and said it might offload its underperforming pizza chain. Major U.S. equities indexes dropped Tuesday as investors reacted to the latest installment of earnings reports and fretted over equity valuations. The S&P 500 fell 1.2%, while the Dow lost 0.5%. Technology was the weakest-performing sector in the benchmark ...