I feel like I still don't understand negative yields, despite really trying to. Negative yields means that I put in $X (or euro/whatever germany is using) and I later am guarenteed no more than $Y out of the exchange, where Y < X. I am literally guaranteed to lose money. I could just hold on to my money, "keep it under my mattress" and still make a better ROI than bonds with negative yields. Why would anybody buy the…
Because the interest rate will soon be less than the bonds. Negative interest rates coming down the pipe globally. Only way that I can see it getting justified.
In addition, these bonds could in fact make you a lot of money in the short term if the interest rate for these bonds continue to get more negative.