https://www.reuters.com/article/us-retail-trading-treasury-yellen-analys/analysis-gamestop-saga-may-provide-early-test-of-biden-administration-ethics-pledges-idUSKBN2A125E

Arguably the last thing new U.S. Treasury Secretary Janet Yellen wants to take up during her first days in office is a financial market imbroglio involving one of her last private sector business relationships.