These ETFs Handily Outperformed the S&P 500 in January, and They're Just Getting Started

The S&P 500 rose 1.4% in January while smaller‑cap exposures outperformed: Invesco S&P 500 Equal Weight ETF (RSP) +3.4%, iShares Russell 2000 ETF (IWM) +5.5%, and Avantis U.S. Small Cap Value ETF (AVUV) +7.2%. The piece argues a potential rotation into smaller stocks is supported by fading tariff impacts (tariffs raised to highest levels since 1932), market expectations for at least two Fed rate cuts in 2026, and extreme S&P concentration (top 10 = 41%), noting forward P/Es of equal‑weight 17.4 versus cap‑weighted S&P 500 21.8, Russell 2000 26.5, and S&P 600 15.8. Managers should consider rebalancing toward equal‑weight or quality small‑cap exposures to capture possible mean reversion as macro and valuation tailwinds favor smaller companies.

Analysis

Market structure: The January outperformance of IWM (+5.5%) and RSP (+3.4%) signals a rotation from cap-weighted, AI-dominated megacaps (top 10 = 41% of S&P) into smaller, higher-beta names. Expect index rebalancing and ETF flows to re-allocate several percent of passive AUM if dispersion narrows; that increases demand for small-cap liquidity and reduces marginal buying power for megacaps. Cross-asset: two Fed cuts priced in 2026 should compress credit spreads (~+50–150bp benefit for small-cap floating-rate borrowers), likely pressuring Treasury yields lower, weakening USD vs. peers and supporting commodity/cyclicals (copper, oil).

Risk assessment: Key tail risks are renewed tariff/ trade shocks (reimposition could cut small-cap EPS by >5–10%), Fed surprises (no cuts or hawkish pivot) that favor defensive megacaps, and a regulatory hit to AI leaders that re-concentrates flows. Timeline: immediate (days) = momentum/flow-driven moves; short-term (1–6 months) = rate path and earnings revisions; long-term (12–24 months) = structural earnings mean reversion. Hidden dependency: small-cap outperformance assumes credit access and stable commercial lending; regional-bank stress or tightening covenants would reverse the trade.

Trade implications: Tactical positioning favors quality-screened small-cap exposure (AVUV, S&P600) and equal-weight (RSP) versus SPY/QQQ mega-cap exposure; implement 2–3% initial longs with tight risk controls and scale to 4–6% if NTM EPS revision differential (small-cap minus megacap) widens >5% over two quarters. Options: buy 3–6 month AVUV or IWM call spreads and buy OTM puts on QQQ/NVDA as tail hedges; pair trades (long AVUV, short QQQ) isolate rotation beta. Monitor catalysts: two FOMC cuts priced by Sep 2026, CPI month-on-month <0.2% as green light, tariff rollbacks or lack thereof as stop/kill events.

Contrarian angles: Consensus underestimates quality divergence inside small-caps—broad IWM has many loss-making names (Russell 2000 Fwd P/E = 26.5) while S&P600/AVUV trades ~15.8; prefer AVUV over raw IWM to avoid value traps. The rotation could be overdone: if megacap AI earnings accelerate, leadership may reassert and squeeze small-cap longs; watch top-10 S&P concentration falling below 35% as confirmation, and beware liquidity/slippage in small-cap ETFs if rapid inflows occur.

Key Decisions for Investors

• Establish a 2–3% long position in Avantis U.S. Small Cap Value ETF (AVUV) within 1–4 weeks, target 8–15% upside over 3–9 months; set stop-loss at -8% and trim half if position gains +10%.
• Allocate 2% to Invesco S&P 500 Equal Weight ETF (RSP) and reduce mega-cap SPY/QQQ exposure by 1.5% (sell SPY or short 1.5% notional) to capture mean reversion; reassess after two Fed meetings or if top-10 S&P concentration shifts by >3 percentage points.
• Implement a pair trade: long AVUV (2%) / short QQQ (1.5%) to isolate rotation; hedge with 3–6 month AVUV 5–10% OTM call spreads and QQQ 3–5% OTM put spreads sized to cap max loss at ~3% portfolio impact.
• Buy protection: purchase 3–6 month NVDA or QQQ puts (1–2% notional) if concentrated mega-cap exposure remains >40% of S&P; reduce/close puts if CPI month-on-month prints <0.2% and futures price in two Fed cuts by next FOMC.
• Trigger/monitor rules: add to small-cap exposure if 12-month forward EPS revision differential (S&P600 minus S&P500 megacap cohort) widens >5%; cut or reverse if tariff announcements raise effective import duty by >2 percentage points or if credit spreads on BB-rated bonds widen >75bp.