There's plenty to watch this week, including the first Federal Reserve meeting of the year. However, investors will get the chance to refocus on what matters most for share prices, and that's corporate earnings. More than 100 S&P 500 companies are set to announce results, including four of the so-called Magnificent 7 cohort. We'll hear from Meta, Microsoft, Tesla and Apple this week, which collectively represent some 16% of the S&P 500 by size.