SEICHEdispatches · live board
2026-07-15 · STRAIN · the daily letter

SRF accepted moved overnight: the strain tape gets a data point

The composite reads 46, regime STRAIN. The Tell reads +27. Every number below is checkable on the board.

The composite reads 46 out of 100, STRAIN, on 100% coverage. The pipes are working harder for the same result. This is the regime where surprises stop being cheap.

The heaviest hand on the dial is weather at a score of 84, worth +9.2 points of the total. A composite is only as honest as its decomposition, so here it is.

The Tell, the gap between what the pipes measure and what the screens price, reads +27: plumbing indicators at the 58th percentile of their own history, market indicators at the 31th.

The gap is modest. Modest gaps are what most days look like, and saying so is part of the record.

Overnight, the tape did move: SRF accepted printed 0.10 $B (level z +67.5, change z +17.0, as of 2026-07-14); MMF repo with FICC (sponsored) printed 1,168.72 $B (level z +6.7, change z -0.1, as of 2026-05-31); Central bank liquidity swaps outstanding (H.4.1) printed 170.00 $M (level z -0.2, change z -5.3, as of 2026-07-08).

The dates that matter

The next date that matters is 2026-07-21: $282B auction settlement while reserves sit below the estimated kink, worst case $3,040B. The turn model puts 2026-07-31 (month_end) at +3.0bp with a band of [-1.0, +7.8], severity 2/5. FOMC decides 2026-07-29, 14 days out. The corporate tax date lands 2026-09-15, 62 days out; tax dates drain reserves on a schedule everyone can read.

What the board is honest about

All sources and engines report live. The misses this board has made sit in PROOF next to the hits; read those before weighting today's letter.

The desk's forward read

Bathymetry puts the odds of an event inside five business days at 8%, mean first-passage roughly 74 business days. The learned model reads 3% for the same window and calls it does not out-rank the rule-based index. The regime chain gives 0% odds of touching STRESS inside 21 business days, with an expected dwell of 11 business days in the current state. Resonance reads 71: the Year-end (G-SIB surcharge snapshot) mode is amplifying at 6.3x, which is the basin ringing louder to the same calendar.

Positioning

The most crowded seat is SOFR-3M, leveraged net -0.22 of open interest (z -2.5). Dealer warehouse holds $428B, the 96th percentile of its history, 40% of it long end. Positioning data is COT and carries its native T+3 lag; the lag is shown, never hidden.

Echoes

episodewindowsimilarity
Mar 2020 dash-for-cashT−21d0.68
Apr 2025 tariff shock basis unwindT−22d0.58
Sep 2025 tax-date squeeze (SOFR +18bp over EFFR)T−14d0.57
Sep 2019 repo spike (SOFR 5.25%, GC 10%)T−2d0.55

Similarity is not destiny. The echo table says this rhymes, and PROOF says how often rhymes mattered.

What would change the desk's mind

Srf or discount window take-up on a day with no calendar excuse, a mover breaching ±3 z on the funding side, or the composite crossing 60. When one of those prints, the letter will say so, in this same place, with the number.

The board recomputes six times a day; this letter freezes one reading of it. Free public data with native lags. Not investment advice.

Written by the terminal from the live board, no model in the loop; every number is checkable on the free board. Seiche is free open source software (AGPL-3.0, source). Plain English guide · Support · Not investment advice.