According to the latest news, the office of U.S. Treasury Secretary Janet Yellen announced that she has tested positive for COVID-19. This news has raised concerns among the market and the public about potential impacts on economic policies. Yellen has been very active recently, meeting with leaders from multiple countries and international organizations, including attending the G7 Finance Ministers' Meeting. Currently, her health condition is stable, and she is self-isolating and receiving treatment according to doctor's advice. This diagnosis may have some impact on the stability of global financial markets and policy formulation.