On January 21, 2020 Donald Trump addressed the audience at the World Economic Forum in Davos, Switzerland. He laid out the many economic accomplishments of his administration.
The speech took half an hour. On the same day, the CDC announced that Covid was discovered in Washington state, Thus began the economic downturn in the US
Special Address by Donald J. Trump, President of the United States of America | Davos 2020
https://www.youtube.com/watch?v=Yt86DUXju1k
There are no coincidences.