Japan sells JPY 1.98tln 10yr JGBs, b/c 2.56x (prev. 3.13x), average yield 2.840% (prev. 2.729%)

A softer 10yr JGB auction on the standard tells: the bid-to-cover stepped down from the prior sale, the tail widened, and the average yield backed up. In the Japanese auction calendar the tail is the cleanest read on end-user demand, and tails of this size have historically marked episodes where dealers were left holding more of the line than they wanted, with the cheapening tending to persist into the following sessions rather than reverse on the day. The backdrop matters here: through the BoJ's normalisation phase, 10yr auctions have periodically struggled when rate-hike expectations were building into a policy meeting, and weak results have previously fed through to the super-long sector via the 10s30s slope rather than the front end. Worth noting the price detail: lowest accepted price well below the prior sale confirms the concession was demanded, not just offered. The follow-ons are the next longer-dated supply, any BoJ commentary on yield moves, and whether the bid-to-cover recovers at the next 10yr or confirms a pattern of thinning sponsorship at higher yield levels.