Austria's 100-Year Bonds

In 2017, Austria issued 100-year bonds with a paltry yield of 2.112 percent. But recently, the country issued more 100-year bonds with the unbelievably low yield of .88 percent! And the issue was four times oversubscribed, meaning investors were willing to buy four times the amount of bonds than were being offered. Given the ultra-low interest rate environment, investors appear to be taking risks too attain any positive yield. For example, half of the German government debt has a negative yield, and the yields on Austrian government debt with less than 20 years to maturity are negative as well.