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LH SPECIALIST · Livestock / Event-Driven

Z1388 – LH Hogs and Pigs Breeding Surprise

Quarterly USDA Hogs and Pigs breeding-inventory surprise, as a ten-day Lean Hogs event-detector.

At a glance

As of Oct 30, 2026. Updated nightly.

OBJECTIVE

This is an event-driven signal. Four times a year the USDA Hogs and Pigs quarterly report lands, a count of the breeding herd in the field. The signal scores that release against the trailing three-year trend. A breeding herd materially below trend reads positive (tight herd, bullish Lean Hogs six to twelve months forward); a herd above trend reads negative (expansion, bearish forward). The signal fires on the release date, decays exponentially over the next ten trading days, then returns to zero until the next release. Between release windows the reading is 0.0 and the state is NEUTRAL. That is the design, not a bug. The current reading is 0.0 NEUTRAL because the September 30, 2026 release window closed on October 14; the next USDA Hogs and Pigs is approximately December 23, 2026. When the signal fires, the twenty-day forecast correlation is +0.062 with a 58.4% hit rate (p=0.000, significant) and a modest edge that fades to zero by day eleven. B-minus grade; the forecast is real but modest, and the usable trading window is the first week after each release.

LIVE CHART

THE TAKEAWAY

THE REGIME MAP

State distribution and forward-return sample across 9,299 trading days. The signal is zero outside event windows, which is why Normal dominates the sample at 96.7 percent. The fire-day samples (Tight herd and Loose herd) are small but direction-correct: tight-herd events are followed by stronger Lean Hogs forward returns than baseline, loose-herd events are followed by weaker.

Forward returns measured against Lean Hogs 60-day forward price windows across the 9,299-day sample (1989-11-30 to 2026-10-28). Tight-herd fire events are followed by +5.55 percent mean fwd60d (3.95pp above the +1.60% all-sample baseline), loose-herd fire events by +0.04 percent (1.56pp below baseline). The sign and the direction confirm the deployed mechanism — tight herd leads bullish-LH forward, loose herd leads bearish-LH. The small sample size (24 tight-herd runs across the thirty-six-year history) is the honest sample-count caveat; results are statistically significant on nominal n but the macro-beta artifact caveats apply.

The historical pattern

THE TRACK RECORD

16 state transitions from 12/30/2024 to 10/28/2026. Full history (119 total transitions since 11/30/1989) is downloadable.

Scroll inside the table for the full history. Forward 60-day SPY is measured from each run’s start date; a reader cannot trade off a start-date they only identify in hindsight, so this is a transparency log, not an alpha claim. Asterisked (*) returns are partial. The run is less than 60 trading days old. The full 60-day comparable fills in as more data arrives.

The signal reads the USDA NASS Hogs and Pigs quarterly report, specifically the national national breeding-inventory count. For each release (March, June, September, and December, around the 23rd of the month at 3:00 PM Eastern), it computes two things: a trailing twelve-quarter rolling mean (three years, the structural trend) and a trailing twelve-quarter rolling standard deviation. Deviation of the current print from that mean, divided by the standard deviation, gives a z-score. The sign is inverted so that a breeding herd below trend reads positive, and the output passes through tanh to bound between -1 and +1. On the release date, the full signal is laid down; on each subsequent trading day the magnitude decays by exp(-day / (10/3)), so the signal fades about 95% by day ten and returns to zero on day eleven. Outside the event window the reading is 0.0. Mechanically: breeding-herd size leads slaughter supply by six to twelve months (sow gestation is 114 days, finishing from wean takes approximately six months). A below-trend breeding count means less supply in the pipeline six to twelve months out, which maps to tighter hog supply and higher Lean Hogs prices on that horizon. The opposite holds for above-trend prints. The signal is systematic encoding of the single most-watched scheduled-release event on the Lean Hogs calendar: traders memorize the Hogs and Pigs dates, and limit moves on release day are common.

The Lean Hogs analytics stack this event-driven signal plugs into. The release-day surprise compounds when paired with the continuous Breeding Herd Lead (trend read), the Hog-Corn Ratio (producer margin), and the Pork Cold Storage Inversion (finished-product inventory).

Not investment advice · The analysis on this page is informational and educational. Signal readings, historical case figures, and empirical statistics are derived from publicly available data and are provided without warranty. Hypothetical performance results have inherent limitations, including the benefit of hindsight. Readers who intend to trade should consult a licensed investment professional and see the research brief for the full disclaimer.

Last refreshed Oct 31, 2026 05:34 AM ET