I'm not going to buy any bonds in the current environment: Swedish 3-month bills yield -0.5%, 10-year bonds yield -0.2%. Whatever the historical data says, I can't see anyone buying at those prices unless they have to.
Conversely, for EUR based fund managers you’ll likely be better of sticking to negative yielding EUR denominated bonds vs treasuries.
Source:
https://www.forbes.com/sites/vineerbhansali/2019/06/17/tradi...
https://www.ft.com/content/85c56472-bdcb-11e9-b350-db00d5096...