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Z2897 Argentina Pampas Rainfall + Soil Moisture (Corn-Phenology Gated)

Argentina’s Pampas rainfall from CHIRPS satellite precipitation and soil moisture from NASA SMAP, phenology-gated to the December-February Southern Hemisphere summer growing window. The strongest standalone signal in the LOCKED corn portfolio: EXTREME_POS state (Argentine Pampas drought) delivers plus 8.51 percent corn forward 60-day returns with HAC-t plus 8.10 , significant at the 1 percent level across 669 state-days.

Current reading

-0.171

NORMAL

DORMANT · WAITING FOR DEC

DAILY · SIGNAL

As of Oct 30, 2026. Updated nightly. · NEXT WINDOW DECEMBER 2026

Current composite

-0.1907

On the plus-or-minus one scale; Pampas moisture modestly above norm, phenology-gate near-dormant (October)

SEASONAL STATE

DORMANT · WAITING FOR DEC

The Argentine Pampas growing season has closed. The signal is in off-season drift mode until the next November-April window opens. The current reading carries pre-season setup information from CHIRPS and SMAP data but not live phenology-vulnerability firing.

Signal state

Normal

6 consecutive days in episode (lower half of NORMAL band)

All-time percentile

30.4th

Lower-middle of 36 years Historical sample is dominated by in-season firings (Dec-Feb); off-season readings are pre-season drift with reduced directional conviction.

Historical sample is dominated by in-season firings (Dec-Feb); off-season readings are pre-season drift with reduced directional conviction.

EXTREME_POS corn fwd 60d

+8.51%

669 days (7.5%), HAC t +8.10 sig at 1% , strongest standalone edge in LOCKED corn portfolio Historical sample is dominated by in-season firings (Dec-Feb); off-season readings are pre-season drift with reduced directional conviction.

Historical sample is dominated by in-season firings (Dec-Feb); off-season readings are pre-season drift with reduced directional conviction.

EXTREME_NEG corn fwd 60d

-4.04%

1,316 days (14.7%), HAC t -7.29 sig at 1% Historical sample is dominated by in-season firings (Dec-Feb); off-season readings are pre-season drift with reduced directional conviction.

Historical sample is dominated by in-season firings (Dec-Feb); off-season readings are pre-season drift with reduced directional conviction.

LOCKED portfolio weight

7.7%

1/13 equal-weight in Layer 1 base sleeve, polarity +1

OBJECTIVE

Argentina is the world’s third-largest corn exporter behind the US and Brazil, producing approximately 55-60 million metric tons annually with the Pampas region generating approximately 70 percent of total output. The Argentine corn growing season runs opposite the US , planting in September-October, pollination in December-January, grain fill in February, harvest March-May. The Pampas climate is the single most important determinant of global corn balance during December-February: when the Pampas is in drought during Argentine pollination, Argentine production collapses and global corn balance tightens dramatically. This signal fuses two satellite data sources that NASA and the US Climate Hazards Center publish in near-real-time with approximately 7-day operational lag: (1) CHIRPS rainfall across the Argentine Pampas corn/soy/wheat region computed as 90-day cumulative precipitation z-scored on a 15-year rolling window, and (2) SMAP soil moisture at the Pampas regional aggregate, z-scored on 5-year rolling window. Both are polarity-inverted (dry = positive signal, which maps to bullish-corn via Argentine supply reduction). The engine applies a PHENOLOGY-GATE multiplier: full weight during December-January-February peak pollination/grain-fill window, half weight during November-March shoulder, 0.3 base weight otherwise. An additional NOAA ONI amplifier adds minus 0.4 × tanh(ONI/1.5) to capture the La-Niña-dries-Pampas teleconnection. The satellite publication lag (SATELLITE_LAG_DAYS parameter) shifts both input series forward in time so the signal uses only data that was publicly available on each historical date , no look-ahead. Across 36 years of history, the empirical state-conditional corn fwd 60d pattern is cleanly directional and strongly significant. EXTREME_POS state (val above plus 0.5, Pampas drought during peak Argentine growing window) delivers mean corn fwd 60d of plus 8.51 percent (HAC Newey-West t plus 8.10, significant at 1 percent, 669 state-days). EXTREME_NEG state (val below minus 0.5, Pampas wet during peak window) delivers minus 4.04 percent (HAC t minus 7.29, significant at 1 percent, 1,316 state-days). Both tails are among the strongest standalone HAC-t values in the entire LOCKED corn portfolio. The signal reads minus 0.1907 as of October 23 2026 in NORMAL territory for 6 consecutive trading days at the 30.4 percentile. Current conditions reflect modest post-harvest Pampas moisture (mid-autumn Southern Hemisphere) with the phenology gate near-dormant since October is outside the peak Dec-Feb window. The next active-signal window begins approximately December 1 2026. The signal contributes 7.7 percent weight to the LOCKED corn portfolio v1_1 Layer 1 base sleeve with polarity sign plus one. Read on for the mechanism, the three signature historical cases, and the current reading in context.

LIVE CHART

THE TAKEAWAY

THE REGIME MAP

Behavior across the Argentina Pampas rainfall-and-soil-moisture composite (CHIRPS precipitation + NASA SMAP soil moisture), phenology-gated to the December-February southern-hemisphere summer growing window. Positive composite = Pampas drought (bullish US corn via global supply tightening). CBOT corn benchmark.

The historical pattern

THE TRACK RECORD

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 engine queries CHIRPS Regional Daily rainfall for region `ARGENTINA_PAMPAS_SOY_WHEAT` from the weather database. Computes 90-day cumulative rainfall. Z-scores on 15-year rolling window with 3-year minimum. Polarity-inverts (`drought_z = -rain_z` so dry maps to positive). Separately queries SMAP Regional Daily soil moisture for the same Pampas region, z-scores on 5-year rolling window, polarity-inverts. Applies satellite publication-lag shift (SATELLITE_LAG_DAYS parameter adds this many days to the index of each input before reindexing to backtest dates , removes look-ahead on near-real-time satellite data). Combines CHIRPS drought-z plus SMAP drought-z (equal weight). Applies phenology-window multiplier: 1.0 during Dec-Jan-Feb peak, 0.5 during Nov + Mar shoulder, 0.3 otherwise. Adds NOAA ONI amplifier (`-tanh(ONI/1.5) * 0.4` , La Niña contributes positively to the composite). Multiplies by HMM regime amplifier engine data (optional). Clipped and tanh-bounded. Five-state machine on the final the primary composite.

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 Nov 02, 2026 12:09 PM ET