Since 2018, tariff policy has returned to the center stage of global affairs, catalyzed by U.S. efforts to rebalance trade relationships under Presidents Donald Trump and Joe Biden. As governments rethink the rules of globalization, reporters who previously had not been trade experts are being asked to cover this highly specialized area of business journalism. Those covering trade must understand not only how tariffs work, but also how they ripple across economies.

In this tipsheet,  Matthew Mosk, director of CBS News’ investigative unit, shares what it takes to succeed as an investigative journalist.