On Thursday, July 18, U.S. stock markets closed lower, reversing early gains as investors moved away from high-priced megacap growth stocks amid second-quarter earnings season. All major indexes dropped, with the Dow breaking its streak of record highs. S&P 500 sectors closed mostly negative, with healthcare, consumer discretionary, and financials suffering the largest losses. Energy stocks, however, closed higher. According to economic data, U.S. initial jobless claims rose by 10,000 to 243,000 for the week ending July 13, exceeding estimates of 230,000. The Philadelphia Fed Manufacturing Ind…