Earnings playbook: An investor's guide to the reports ahead, including Walmart and Nvidia

Traders work on the floor of the New York Stock Exchange (NYSE) in New York City, January 26, 2022.
Brendan McDermid | Reuters

Earnings season starts to thin out this week, with many of the large reports behind us. Corporate earnings have largely outperformed expectations, but it remains to be seen how long the Covid omicron threat and rising inflation will weigh on Wall Street.