US sells 3-month bills at a high rate of 3.715%, B/C 2.86x; sells USD 79bln of 6-month bills at a high rate of 3.780%, B/C 2.97x

Weekly bill auctions are the most routine debt sales on the calendar, and outcomes at these maturities trade almost entirely as a read on the front-end carry and on money-market demand for short paper rather than as fresh information. Bid-to-cover ratios in the high twos are typical of bill supply and indicate comfortable absorption; the metric that tends to matter more is the tail versus when-issued pricing, which speaks to whether dealers had to warehouse residual supply. The 3-month and 6-month rates sit as a spread against the policy rate and against expected cuts, so any drift in that spread across successive auctions is the tell for shifting expectations on the timing of easing rather than the levels themselves. Larger 6-month sizes have historically preceded periods where Treasury leans on bills for financing flexibility, a pattern that shows up in the calendar of upcoming auction announcements. The follow-ons are the next coupon auctions and any change in bill supply guidance, since that is where funding pressure or resilience actually shows.