Germany actually recently sold negative coupon bonds, i.e a buyer of this bond would pay more upfront than the maturity value. https://www.reuters.com/article/

Germany actually recently sold negative coupon bonds, i.e a buyer of this bond would pay more upfront than the maturity value. https://www.reuters.com/article/germany-auction/update-2-germany-sells-new-30-year-bond-with-negative-yield-a-first-idUSL5N25H29G https://www.reuters.com/article/germany-auction/update-2-ger...