Ashley Gardyne: What 2025’s wild markets taught investors heading into 2026

A tariff-driven sell-off in April pushed the S&P 500 down roughly 12% in days (nearly 20% from February highs) and sent the VIX above 50 before markets rebounded as trade deals were reached and the Fed restarted rate cuts. Underpinning the recovery was heavy corporate investment in AI infrastructure, with S&P 500 corporate profits rising about 12–13% in each of the first three quarters of 2025 and revenues accelerating into H2; market leadership broadened as Europe and emerging markets outperformed a US market concentrated (≈40% in 10 stocks, 7% in Nvidia). With inflation near 3% and rate cuts underway, the note flags fixed income as more attractive than cash and recommends diversification and selective stock-picking as key themes for 2026.

Analysis

Market structure: The AI capex cycle makes data‑centre suppliers, semiconductor equipment makers and power/utilities clear winners (direct demand lift; capex visible in 2025 with S&P profits +12–13%). Conversely, passive US-large-cap concentration (≈40% of S&P in 10 stocks; NVDA ~7%) raises index fragility—small misses can create outsized drawdowns. Elevated capex tightens demand for copper/semiconductor supply for 6–24 months, supporting commodity/EM cyclicals.

Risk assessment: Tail risks include tariff re‑escalation (repeat of April could trigger 10–20% equity gap in days), semiconductor export controls or AI regulation (30–40% downside for targeted names), and grid/energy shortages feeding inflation and forcing Fed hawkishness. Immediate (days): volatility spikes/VIX>30; short (weeks–months): earnings and capex cadence; long (quarters–years): supply expansions and secular AI adoption. Watch second‑order: energy inflation from capex-driven electricity demand.

Trade implications: Prefer selective stock‑picking and regional rotation—overweight European (VGK) and EM (EEM) cyclicals and small‑cap/value (IWN/IWM) for 6–12 months, hedge US mega‑cap concentration by reducing S&P passive exposure by 2–4%. Allocate 2–5% to intermediate IG bonds (IEI/LQD) for carry if Fed cuts continue. Use options: buy 3–6 month NVDA put spreads (10%/25% OTM) and 3 month S&P downside put spread as a 0.5–1% tail hedge.

Contrarian angles: Consensus underestimates index concentration risk and overestimates perpetual winner‑takes‑all. NVDA is priced for near‑perfect execution—a 15–25% miss on guidance would likely reprice it hard; historically similar capex bubbles (late 1990s tech vs 2010s cloud) show faster mean reversion in constituent leaders. Unintended consequence: broadening could lift overlooked NZ equities and value sectors if earnings converge; monitor data‑centre order books and energy prices over next 30–90 days as decisive catalysts.

Key Decisions for Investors

• Establish a 3% long position in VGK (Europe) and a 2% long position in EEM (Emerging Markets) over the next 2 weeks, re‑evaluate after the next two quarterly earnings windows (60–90 days) to capture broadening away from US mega‑caps.
• Reduce passive S&P 500 exposure by 2–4% and reallocate 2–3% into small‑cap/value (IWN or IWM) within 30 days; target a 6–12 month holding period to benefit from mean reversion in fundamentals.
• Buy a 3‑month NVDA put spread sized ~1% of portfolio: buy 10% OTM puts and sell 25% OTM puts (percentages relative to spot). Take profit if NVDA drops ≥20%; cut loss if NVDA rallies >10% from entry.
• Allocate 3–5% to intermediate‑duration fixed income (IEI for 3–7yr Treasuries + 2% to LQD for IG corporates) within 30 days to replace cash yields; trim if 10‑yr Treasury yield falls >50 bps (lock profits).
• Purchase a 0.5–1% portfolio tail hedge: 3‑month S&P 500 10% OTM put or equivalent VIX call exposure; initiate immediately and refresh every 60–90 days or after major macro events (tariff/regulatory announcements).