La Niña weakening, El Niño possible later this year

The U.S. Climate Prediction Center expects the ongoing La Niña to fade to ENSO-neutral by early spring, with neutral conditions likely persisting into summer. Forecasters note early signs that El Niño may form by late summer or autumn, which typically raises Pacific wind shear and can suppress Atlantic hurricane activity—an outcome with implications for insurance exposure, agricultural yields and shipping logistics. This is the first monthly CPC outlook using a revised ocean-temperature monitoring method adjusted for climate-change effects.

Analysis

Market structure: Transition from La Niña → ENSO‑Neutral now and possible El Niño by late summer (peak hurricane season) re‑orders winners/losers. Insurers/reinsurers (short‑tail P&C) and Gulf energy services lose tail risk (historically ~20–30% decline in major Atlantic hurricanes during El Niño years), while agriculture, fertilizers and tropical commodity exporters face higher production volatility and potential supply shocks.

Risk assessment: Immediate (days–weeks) impact is limited—markets anchored to neutral; short‑term (weeks–months) hinge on CPC/NOAA updates and 3‑month SST anomalies crossing +0.5°C; long‑term (quarters) a confirmed El Niño would amplify crop yield downside risk and rerate insurance loss assumptions. Tail risks include a stronger‑than‑expected El Niño (severe droughts/floods) or a measurement artefact from the new monitoring baseline that shifts historical comparables and pricing models.

Trade implications: Expect tighter agricultural supply/demand into H2 2026 if El Niño emerges—favor long fertilizer equities (MOS, CF) and call spreads on agricultural ETFs (SOYB, CORN) for Dec 2026 expiries; trim Gulf‑focused oil risk premia and selectively add P&C/reinsurer longs (RE, CB) into summer if CPC probabilities exceed 60%. Use options to express asymmetric views: buy call spreads on SOYB/CORN and sell hurricane‑season crude call spreads to capture reduced storm risk.

Contrarian angles: Consensus underweights contagion from Pacific impacts (SE Asia palm/sugar + Central/South America coffee). If CPC El Niño probability remains <40% by June, the insurance rally is likely overdone; conversely a rapid (>60% by July) build would leave agricultural shorts exposed — trade size and timing should follow explicit CPC probability thresholds.

Key Decisions for Investors

• Establish a 2–3% long position in re/insurers RE (Everest Re, ticker RE) and Chubb (CB) between April–June 2026, trim by 50% if CPC El Niño probability >60% by July; target holding through Nov 2026 to capture reduced Atlantic hurricane losses and likely positive EPS revisions.
• Initiate 1.5–2% long equity positions in fertilizer majors Mosaic (MOS) and CF Industries (CF) now, adding to 3–4% total if three‑month Niño3.4 SST anomaly exceeds +0.5°C by Aug 1, 2026; horizon 6–12 months anticipating higher fertilizer demand/pricing from crop stress.
• Buy Dec 2026 call spreads on SOYB and CORN (e.g., 15–20% OTM strikes) sized to 1–2% notional each to capture asymmetric upside in agricultural prices if El Niño develops; cap cost by using vertical spreads.
• Reduce directional crude/Oil equity exposure by ~25% into June–Oct 2026 and sell Aug–Oct 2026 WTI call spreads (collect premium) to monetize lower hurricane risk; reverse reductions only if CPC reverses to La Niña or storm models show elevated Gulf activity.
• Use an objective trigger: monitor CPC/NOAA ENSO probability weekly—if El Niño probability >60% by June 30, increase ag/fertilizer exposure by an incremental 1–2% and cut reinsurer position by 50%; if probability stays <40% by July 15, flip: reduce ag option risk by 50% and take profits on reinsurer longs.