Subscriber OnlyMarketsGermany to Test Haven Demand as 30-Year Bond Coupon Set at 0%ByJames Hirai+FollowAugust 20, 2019, 4:00 AM UTCUpdated onAugust 20, 2019, 1:56 PM UTCWant the lowdown on European markets? In your inbox before the open, every day. Sign up here.Germany will sell a 30-year bond at a 0% coupon for the first time on Wednesday, in a flurry of debt sales in the next two weeks offering negative rates.