Treasury auction results with the tail, in context

High yield, bid-to-cover, the tail against the when-issued yield, and who bought, per auction, within your plan's depth. tail_bps is null for bills, which have no when-issued market, and for any auction whose when-issued print was not captured; a negative tail_bps is a stop-through (the auction cleared below the when-issued yield, i.e. strong demand). Every row also carries vs_12m: that tenor's trailing twelve-auction averages for the tail, bid-to-cover and bidder split (withheld under 3 priors), plus pctile (the print's rank in the tenor's full captured history, withheld under 12 priors) and a significance note like 'the weakest bid-to-cover since 2024-03-12' when a print is beyond everything back at least a year. The print arrives with its own norm, so an agent can judge it without fetching history. The dataset is complete back through the official record: record marks each row desk (captured live by Helious, may carry a tail) or official (TreasuryDirect backfill, no tail: TD does not publish when-issued yields). Pass tenor to ask about one part of the curve, which is what answers "how did the last 10-year auction go".