https://www.nytimes.com/live/2020/09/04/business/stock-market-today-coronavirus#jobs-report-august-2020

Hi. Above is the link for the article (The U.S. added 1.4 million jobs in August as unemployment fell to 8.4 percent.) I would like to know what kind of economics theories/concept can be apply or to apply on it? In terms on Macroeconomics.

Feel free to reply in the comment section if there's confusion:)