There is a big difference between a bond with a negative yield to maturity than a bond with a negative coupon rate. Many in the market conflate the two.
We are searching for bonds that pay a negative coupon rate. Rare, but some do exist.
Here is a good clarification.
Because of the complexity of having a negative coupon, it is common on negative-yielding issues to sell the bonds at a cash price higher than par. This means the issuer pays back less than the amount borrowed, removing the need to figure out how to organise reverse coupon payments.
This is one of the reasons negative yields on bond issues remain a rarity and off limits to many investors.
In the corporate bond world, the likes of Deutsche Bahn have issued negative-yielding bonds in the past, and this month Merck sold three tranches of debt, the shortest of which held a negative yield. – Reuters
But they do exist
France issued its first-ever 10-year bond at a negative borrowing rate on Thursday, meaning investors pay, rather than receive, interest for the privilege of owning French sovereign debt, said the state debt management agency, AFT.
AFT said in a statement that it issued 9.996 billion euros ($11.3 billion) in long-term bonds, with just under half — or 4.972 billion euros — in the form of 10-year bonds at a rate of -0.13 percent. – France 24
This is an interesting one.
Copenhagen | In the world’s biggest covered-bond market, a Danish bank says it’s now ready to sell 10-year mortgage-backed notes at a negative coupon for the first time.
It’s the latest record to be set in a world that’s being dragged down by ever lower interest rates. In Denmark, where Jyske Bank will offer 10-year mortgage bonds at a fixed rate of minus 0.5 per cent, average Danes will borrow at rates far lower than those at which the US government can sell its debt. – Financial Review