WHEAT SPECIALIST · Grain / Climate Teleconnection
Z4547 – [W] NOAA Oceanic Niño Index (El Niño on Wheat)
El Niño drives Australian wheat drought; the empirical 60-day wheat response is modestly bearish, not the naive bullish-supply-shock read.
At a glance
IN-SEASON · ACTIVE
Current reading
+0.927
On the plus-or-minus one scale; NOAA ONI post-60-day publication shift.
SEASONAL STATE
IN-SEASON · ACTIVE
Signal live year-round on monthly NOAA release cadence.
Signal state
Extreme POS
Current state across the La Niña / Neutral / El Niño regime.
Phase duration
89 sessions
Consecutive trading days in the current phase.
Sample
36 years
Monthly NOAA ONI, 1990 onward.
As of Nov 03, 2026. Updated nightly.
SIGNAL OVERVIEW
ENSO (El Niño Southern Oscillation) has a region-dependent impact on wheat production globally. The naive narrative holds that El Niño causes Australian drought — Australia is the world’s number-three wheat exporter — and therefore tightens global wheat supply and lifts CBOT SRW wheat.
The empirical 60-day pattern is more nuanced. El Niño extreme regimes historically precede modestly bearish CBOT SRW forward returns, not bullish. The most likely explanation is that US Plains soft red winter wheat benefits from La Niña rainfall and suffers under El Niño drought conditions, so the US-side supply shock partially offsets the Australia-side bullish-supply angle. Horizon matters — the 60-day response captures a different piece of the ENSO-to-wheat transmission than the multi-month ultimate supply-side impact.
LIVE CHART
Thirty-six years of the NOAA Oceanic Niño Index against CBOT SRW wheat forward returns.
What the chart is showing. The dark line in the top panel is the NOAA Oceanic Niño Index composite on a tanh-bounded plus-or-minus one scale — positive means El Niño regime, negative means La Niña. The bronze line in the middle panel is the CBOT SRW wheat front-month in cents per bushel. The bottom panel tracks the 252-day rolling information coefficient between the composite and wheat 60-day forward returns. Dashed horizontal lines mark the plus-or-minus 0.2 moderate and plus-or-minus 0.5 extreme thresholds.
COMPOSITE
+0.927 / tanh
STATE
Extreme POS
PHASE
+1.64
SAMPLE N
9,000+ days
TODAY’S PLAYBOOK READING
STATE
Extreme Pos
STATE AND HISTORY
Composite +0.927, state Extreme POS, 89 trading days running in the current phase. Per-state baselines in the regime table below.
THE ENSO-WHEAT MECHANISM
El Niño drives Australian wheat drought (Australia is the world’s
HOW TO POSITION
Climate-pattern read with a 60-day horizon. Pair with the Russia Wheat Production YoY, US Wheat Ending Stocks YoY, and Novorossiysk Cargo Pace signals for a full world-wheat picture. ENSO is one input among many; use as a teleconnection overlay, not a standalone trade trigger.
WHAT THE CHART SHOWS
The composite sits at +0.927. Signal state is Extreme POS, 89 trading days running. See the regime table below for per-state baselines.
TOP INPUTS FIRING
- Primary composite +0.927 State Extreme POS, 89 trading days running in the current phase.
- NOAA Oceanic Niño Index (60-day publication-shifted) Raw NOAA ONI lagged 60 days to remove look-ahead bias from the 3-month centered mean.
THE TAKEAWAY
What this means for you today
THE ENSO CALL
Composite +0.927, state Extreme POS, 89 trading days running. Current direction and per-state baselines are in the regime table below.
THE EMPIRICAL CONTEXT
Per-state forward returns in the regime table show the counter-naive pattern — El Niño extremes precede modestly bearish CBOT SRW wheat returns, La Niña runs near baseline. The US-side supply offset dominates the Australia-side tightening at the 60-day horizon.
THE HONEST CAVEAT
ENSO is a monthly climate series. The 60-day publication shift applied in the composite removes look-ahead bias from the 3-month centered-mean construction. The signal’s natural horizon mismatches the ultimate multi-month supply-side impact on wheat; different horizons will show different signs.
THE REGIME MAP
The three ENSO regime states on wheat, forward returns and sample share
Computed from the live window on CBOT SRW Wheat forward returns. Empirical direction is counter-naive — El Niño extremes precede modestly bearish wheat returns.
| State | Phase | Share | Fwd 60d | HAC t | Edge vs baseline | Last firings |
|---|---|---|---|---|---|---|
| El Niño TODAY | +1 | 26.9% (2429 d) | -1.21% | -0.61pp | Jun 2026, Jul 2023, Dec 2019 | |
| Neutral | 0 | 46.9% (4241 d) | -0.26% | +0.35pp | Mar 2026, Jul 2024, Apr 2023 | |
| La Niña | -1 | 26.3% (2376 d) | -0.63% | -0.02pp | Dec 2025, Nov 2021, Nov 2020 |
The historical pattern
The signal across three decades of ENSO regimes on wheat
THE TRACK RECORD
State changes
| State | Start | End | Duration | Fwd 60d Wheat |
|---|---|---|---|---|
| Neutral | 10/23/2024 | 11/28/2025 | 277d | +4.92% |
| Negative | 12/01/2025 | 02/27/2026 | 61d | +0.84% |
| Neutral | 03/02/2026 | 06/29/2026 | 83d | +9.34% |
| Positive | 06/30/2026 | 10/23/2026 | 82d | +2.73% |
Scroll inside the table for the full history. Forward 60-day Wheat 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.
What this measures
El Niño drives Australian wheat drought (Australia is the world’s number-three wheat exporter), but the US Plains soft-red-winter wheat belt also responds to ENSO rainfall patterns, and the net 60-day CBOT SRW wheat response is modestly bearish-under-El-Niño rather than the naive bullish. The composite reads the NOAA Oceanic Niño Index (3-month running mean of Nino 3.4 SST anomalies), applies a 60-day publication shift to remove look-ahead bias, and tanh-bounds. State thresholds plus-or-minus 0.2 (moderate) and plus-or-minus 0.5 (extreme).
Why it matters
Why ENSO reads wheat via region-dependent impact
ENSO drives globally-correlated rainfall and temperature anomalies, but the direction of those anomalies is region-specific. Australia tends dry under El Niño; the US Plains tend wet. For CBOT SRW wheat (which tracks soft red winter wheat grown in the Ohio Valley and eastern Plains), the US rainfall channel often dominates over Australia’s tightness at the 60-day forward horizon.
Why the empirical pattern is counter-naive
Naive reasoning says "El Niño → Australia drought → tight global wheat → bullish wheat." The data shows the opposite at 60 days. US-side supply boost under El Niño rainfall largely offsets the Australia-side tightening in the forward-pricing window. Longer horizons (6-12 months, ultimate supply-side impact) may show different signs; the signal is calibrated to 60-day forward returns.
How to use this signal today
Climate teleconnection overlay. The 60-day publication shift applied in the composite removes look-ahead bias from the raw NOAA 3-month centered mean (the raw series uses future SST data). Pair with the US Wheat Ending Stocks YoY signal (realized domestic balance), Russia Wheat Production YoY (alternative supply), and Novorossiysk Cargo Pace (Black Sea flow). Use as context, not alpha.
Signal consumers and siblings
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 refer to the research brief for the full disclaimer.
Last refreshed Nov 04, 2026 04:40 PM ET