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Portfolio Engineers

Market Structure

A confirmation dashboard for reading breadth, size participation, style leadership, and risk appetite beneath the surface of the U.S. equity market.

Methodology: Signals use the available daily close history. Return windows count trading-day observations; the 1Y comparison uses approximately 252 trading days. Spreads are differences between returns, shown in percentage points (pp). Trend confirmation uses the 20/50-day SMA relationship, with additional momentum and persistence diagnostics used to evaluate breadth, size participation, style leadership, and risk appetite.

This is a signal construction framework — not a proxy for full market history or a market forecast.

Trend Framework

Trend is defined by the 20-day SMA relative to the 50-day SMA using trading-day price observations. Persistence tracks how long that state has remained intact without interruption.

What This Page Does

Momentum shows what is leading. Market Structure shows whether that leadership is broad, durable, and confirmed across participation, style, and risk-taking.

Trend Up4
Trend Down6
Flat0
Constructive Bias0
Mixed Bias4
Defensive Bias6
Informational research signals • Not investment advice.
Latest source close: Oct 02, 2026
Current structure read: Breadth is narrow, size participation is weak, style leadership is growth-led, and risk appetite is speculative.
Implication: The market is mixed beneath the surface, with selective confirmation rather than a clean, broad-based structure signal.
Breadth
Narrow

Benchmark leadership is ahead of equal-weight participation, which usually signals a narrower market with weaker confirmation underneath the surface.

Drivers: VOO Up, RSP Down
Size Participation
Weak

Mid-cap and small-cap participation are both weak, which tends to signal a more fragile market beneath headline index performance.

Drivers: MDY Down, IWM Down
Style Leadership
Growth-led

Growth and momentum are leading while value lags, which usually points to a higher-duration, trend-following market profile.

Drivers: IWF Up, IWD Down, MTUM Up
Risk Appetite
Speculative

High-beta participation is stronger than low-volatility leadership, which usually points to a more risk-seeking market tone.

Drivers: QUAL Down, USMV Down, SPHB Up
Market structure is a confirmation layer, not a forecast. Narrow benchmark strength can persist for a time, while breadth and size participation can improve before headline indexes fully reflect it.
Breadth & Benchmark
Is benchmark performance being confirmed beneath the surface?
VOO · S&P 500
Cap-weighted large-cap benchmark.
Up
Up 113dBias: Mixed
Interpretation

This module tests whether benchmark performance is being supported by broader participation rather than concentrated leadership alone.

Relative spread
VOO is leading RSP by 4.2 pp over the 60-trading-day window.
1Y spread (~252 trading days): VOO leads by 4.8 pp.
RSP · Equal Weight S&P 500
Breadth check beneath cap-weight concentration.
Down
Down 10dBias: Defensive
Size Participation
Are mid-caps and small-caps participating in the move?
MDY · Mid Caps
Mid-cap participation.
Down
Down 16dBias: Defensive
Interpretation

This module checks whether participation is extending beyond large-cap leadership into the broader domestic equity market.

Relative spread
MDY is leading IWM by 2.3 pp over the 60-trading-day window.
1Y spread (~252 trading days): IWM leads by 4.1 pp.
IWM · Small Caps
Small-cap participation.
Down
Down 15dBias: Defensive
Style Leadership
Is leadership coming from growth, value, or trend-following persistence?
IWF · Growth
Long-duration growth leadership.
Up
Up 31dBias: Mixed
Interpretation

This module tests whether leadership is being driven by long-duration growth, cheaper cyclical value exposure, or reinforced by trend-following factor strength.

Relative spread
IWF is leading IWD by 1.8 pp over the 60-trading-day window.
1Y spread (~252 trading days): IWD leads by 14.4 pp.
Momentum context
MTUM · Momentum
Up
Up 5dBias: Mixed
IWD · Value
Value and cyclical style leadership.
Down
Down 5dBias: Defensive
Risk Regime
Is the market rewarding quality and defense, or speculation and beta?
QUAL · Quality
Down
Down 10dBias: Defensive
USMV · Low Volatility
Down
Down 5dBias: Defensive
Interpretation

This module compares defensive equity preference against speculative beta to gauge whether the market is rewarding caution, risk-taking, or something in between.

Current tilt
Speculative
Relative spread
SPHB is leading USMV by 2.9 pp over the 60-trading-day window.
1Y spread (~252 trading days): SPHB leads by 35.8 pp.
SPHB · High Beta
Speculative risk appetite.
Up
Up 26dBias: Mixed
Signal Matrix
Full cross-sectional view of all structure sleeves and their current state at a glance.
TickerSleeveTrendPersistenceBiasRole
VOO
S&P 500UpUp 113dMixedCap-weighted large-cap benchmark.
RSP
Equal Weight S&P 500DownDown 10dDefensiveBreadth check beneath cap-weight concentration.
MDY
Mid CapsDownDown 16dDefensiveMid-cap participation.
IWM
Small CapsDownDown 15dDefensiveSmall-cap participation.
IWF
GrowthUpUp 31dMixedLong-duration growth leadership.
IWD
ValueDownDown 5dDefensiveValue and cyclical style leadership.
MTUM
MomentumUpUp 5dMixedTrend-following factor confirmation.
QUAL
QualityDownDown 10dDefensiveProfitability and balance-sheet strength.
USMV
Low VolatilityDownDown 5dDefensiveDefensive equity preference.
SPHB
High BetaUpUp 26dMixedSpeculative risk appetite.
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© 2026 Portfolio Engineers. Content is provided for research and educational purposes only and should not be interpreted as investment advice or a recommendation to buy or sell any security. Hypothetical or model results may not reflect actual trading outcomes.