Treasury Block Trades [Rolling headline, 15th Sept 2026]

Here the flow spans the 2s5s10s sector with the largest ticket in the 5-year, which on a DV01 basis is a smaller rate bet than the notional suggests; concentration in the belly rather than the long end has historically been the signature of positioning around policy expectations rather than duration or convexity hedging. Blocks printed near unchanged prices tend to be rolls, spread unwinds, or asset-swap related flow rather than directional conviction, and prints away from screen mid are what historically attract attention as aggressive initiation. The tell in episodes of this kind is follow-through: whether open interest confirms fresh positioning versus transfer between accounts, and whether cash benchmarks and the belly of the curve reprice in line once the screen absorbs the size. Timing clustered in the morning session ahead of data or supply has, on previous occasions, preceded curve moves, but without confirmation the tape is descriptive rather than directional.