TIL The Fed can create money "out of thin air" by buying an asset from a financial institution and paying for it with money it simply creates.

https://www.investopedia.com/ask/answers/082515/who-decides-when-print-money-us.asp

https://www.reddit.com/r/todayilearned/comments/152gjgv/til_the_fed_can_create_money_out_of_thin_air_by/