Daily Market Regime Watch

Latest completed U.S. session: Friday, September 18, 2026

Regime Snapshot

Regime: Neutral
Confidence: Moderate-High
Direction: Mixed

Market composite: 52/100 available weight.
Unavailable scored components: None.

Component	Score	Available weight	Read
Trend	19	30	Primary trends remain positive; Nasdaq leads, while the S&P finished a second losing week and Russell remains weaker
Breadth / participation	7	25	S&P and exchange breadth were negative; equal weight fell while cap-weighted S&P rose
Leadership / relative strength	13	20	Technology and semiconductors led decisively, but leadership was narrow and small caps lagged
Cross-market risk confirmation	8	15	VIX and credit were constructive and oil eased; Treasury yields returned to roughly 5% and policy remains restrictive
Momentum / condition	5	10	Nasdaq momentum stayed positive, S&P was marginally positive, Russell and Dow weakened
Composite	52	100	Neutral

The S&P 500 closed at 7,650.50, up 0.17%, Nasdaq Composite at 26,522.55, up 0.39%, and Russell 2000 at 2,860.40, down 0.50%. Source: Associated Press, 2026-09-18.

For the week, the S&P 500 lost 0.1%, the Dow lost 1.7%, the Russell 2000 lost 1.5%, while the Nasdaq gained 0.7%. Source: Associated Press, 2026-09-18.

Friday's headline gains concealed weak participation. WMTMT reported only 150 of 496 S&P 500 members higher and 41 of 99 Nasdaq-100 members higher. Reuters likewise reported declining issues outnumbering advancers on both the NYSE and Nasdaq. Source: WMTMT and Reuters, 2026-09-18.

Interpretation: Neutral remains the appropriate broad-market classification, but Thursday's broad repair did not receive clean follow-through. Technology and credit still argue against Defensive, while narrow breadth, Russell weakness and the return of the 10-year Treasury yield to approximately 5% prevent Risk-On.

Index Scorecard

Index	Primary trend	Intermediate trend	Short-term condition	Momentum	Relative strength / participation	Material change
S&P 500	Positive	Mixed / repairing	Mixed	Flat-to-positive	Weak participation beneath positive close	Second consecutive weekly decline
Nasdaq Composite / Nasdaq-100	Positive	Improving	Positive	Positive	Clear relative leader, but narrow breadth	Only major index positive for the week
Russell 2000	Positive but weaker	Deteriorating-to-mixed	Negative	Negative	Small caps lagging	Fell 0.5% Friday and 1.5% for week

S&P 500: The index closed at 7,650.50, up 0.17%, but lost 0.1% for the week. Source: Associated Press, 2026-09-18. The primary trend remains positive, but Friday's narrow participation and second consecutive weekly loss leave the intermediate condition mixed rather than fully repaired.

Nasdaq Composite: The Nasdaq closed at 26,522.55, up 0.39%, and gained 0.7% for the week. Source: Associated Press, 2026-09-18. It remains the clearest large-index leader.

Nasdaq-100: The Nasdaq-100 closed at 29,644.17, up 0.67%, but only 41 of 99 members advanced. Source: WMTMT, 2026-09-18. Strong index performance therefore came with weak constituent participation.

Russell 2000: The Russell closed at 2,860.40, down 0.50%, and lost 1.5% for the week. Source: Associated Press, 2026-09-18. Small caps continue to contradict a broad risk-on interpretation.

Leadership and Rotation

Technology remained the dominant leadership group. WMTMT reported Information Technology up approximately 0.82%, while semiconductors were substantially stronger. Source: WMTMT, 2026-09-18.

The PHLX Semiconductor Index gained approximately 2.78%, with Micron, Broadcom, AMD and Nvidia among the leaders. Source: Swingfolio, 2026-09-18.

The strength was concentrated. WMTMT calculated that the S&P 500's five largest positive contributors represented more than the index's entire net gain, while only 150 of 496 constituents advanced. Source: WMTMT, 2026-09-18.

Small caps, utilities and rate-sensitive groups lagged as Treasury yields rose. Source: Associated Press and Wall Street Journal, 2026-09-18.

Interpretation: Technology leadership is durable enough to count as genuine relative strength, but Friday's market was not broadly led. The structure resembles concentrated growth leadership rather than a broad risk-on expansion.

Leading Sectors and Subsectors

1. Information Technology

Technology gained approximately 0.82%, the strongest S&P sector in WMTMT's closing dataset. Source: WMTMT, 2026-09-18.

Status: Durable current leader.

2. Semiconductors

The PHLX Semiconductor Index gained approximately 2.78%. Source: Swingfolio, 2026-09-18.

Micron gained approximately 3.92%, Broadcom 2.97%, AMD 2.70%, and Nvidia 1.34%. Source: Swingfolio, 2026-09-18.

Status: Strongest industry leadership and the principal reason the Nasdaq outperformed.

3. Crypto-linked equities

Bitcoin rose nearly 6%, while Coinbase and other crypto-linked equities rallied sharply. Source: Reuters, 2026-09-18.

Status: Strong one-day speculative leadership; not yet a broad-market signal.

Lagging Sectors and Subsectors

1. Utilities

Utilities fell approximately 1.44%, the weakest S&P sector in WMTMT's closing dataset. Source: WMTMT, 2026-09-18.

Status: Rate-sensitive weakness consistent with the rebound in Treasury yields.

2. Communication Services

Communication-services exposure weakened materially; Swingfolio reported XLC down approximately 1.37%. Source: Swingfolio, 2026-09-18.

3. Real Estate and Materials

Same-session closing analysis placed both Real Estate and Materials down approximately 1.4% as yields rose. Source: Swingfolio, 2026-09-18.

Status: Rate and inflation sensitivity remained a drag.

Breadth and Internals

Current-session participation deteriorated sharply from Thursday:

• S&P 500 constituent breadth: 150 of 496 members advanced. Source: WMTMT, 2026-09-18.
• Nasdaq-100 constituent breadth: 41 of 99 members advanced. Source: WMTMT, 2026-09-18.
• Dow constituent breadth: 11 of 30 members advanced. Source: WMTMT, 2026-09-18.
• Broad liquid-stock universe: 2,419 of 5,968 names advanced, approximately 41%. Source: TheDesperateTrader, 2026-09-18.
• Equal-weight S&P proxy: RSP closed at $212.29, down 0.48%. Source: Tallac Options, 2026-09-18.
• Cap-weighted S&P 500: closed up 0.17%. Source: Associated Press, 2026-09-18.

The divergence is material: equal weight fell nearly half a percent while the capitalization-weighted index rose. That confirms Friday's gain was concentrated in large technology names.

A reliable same-session exchange-level new-high/new-low series and a sufficiently comprehensive percentage-above-moving-average dataset were not verified. They are omitted rather than populated with prior-session readings.

Breadth read: Defensive within a Neutral overall regime. Thursday's broad rebound failed to persist into Friday.

Cross-Market Confirmation

Volatility

The VIX closed at 14.81, down 4.08%. Source: Tallac Options using Cboe market data, 2026-09-18.

Assessment: Constructive. Volatility is not confirming broad equity stress.

Credit

The HYG/LQD ratio closed at 0.7500, up from 0.7486 Thursday, and remained in a tight-spread regime. Source: thetrading.tools, 2026-09-18.

HYG closed at $78.50, down 0.29%. Source: Convex, 2026-09-18.

Assessment: Credit remains a significant constructive contradiction to weak equity breadth.

Treasury rates

The 2-year Treasury yield reached 4.744%, its highest intraday level since July 2024, while the 10-year was reported near 4.998%. Source: Wall Street Journal, 2026-09-18.

Assessment: Negative confirmation. Rising yields continue to pressure rate-sensitive equities and constrain valuation expansion.

Oil

Reuters reported Brent crude settling at $104.87 and WTI at $100.30. Source: Reuters, 2026-09-18.

Assessment: Oil eased on the day, providing some inflation relief, but absolute levels remain high.

U.S. dollar

Swingfolio reported the U.S. Dollar Index at approximately 100.22, little changed on the day. Source: Swingfolio, 2026-09-18.

Assessment: Neutral daily confirmation.

Federal Reserve — current state

The federal-funds target range remains 3.75%–4.00% following the September 16 FOMC increase. This is the current official policy state until superseded. Source: Federal Reserve, effective 2026-09-17.

Cross-market read: Mixed. Low volatility and tight credit support risk assets, while approximately 5% Treasury yields and restrictive Fed policy remain important constraints.

What Changed

1. Thursday's broad participation did not persist. Friday's S&P gain came with only 150 of 496 constituents higher. Source: WMTMT, 2026-09-18.
2. Equal weight diverged negatively. RSP fell 0.48% while the cap-weighted S&P gained 0.17%. Source: Tallac Options and Associated Press, 2026-09-18.
3. Semiconductor leadership strengthened further. The PHLX Semiconductor Index gained approximately 2.78%. Source: Swingfolio, 2026-09-18.
4. Treasury pressure returned. The 10-year yield moved back to roughly 5% and the 2-year reached its highest level since July 2024. Source: Wall Street Journal, 2026-09-18.
5. Volatility and credit remained calm. VIX fell to 14.81 and HYG/LQD remained in a tight-spread regime. Source: Tallac Options and thetrading.tools, 2026-09-18.

Risks and Contradictions

Evidence supporting improvement / Neutral: Nasdaq leadership; semiconductor strength; S&P holding a positive primary trend; VIX below 15; tight credit; and lower oil.

Evidence arguing against Risk-On: negative exchange and constituent breadth; equal-weight underperformance; Russell weakness; nine of eleven S&P sectors declining in one same-session sector dataset; the S&P's second consecutive weekly decline; Treasury yields around 5%; and restrictive Fed policy.

The central contradiction is:

Technology, volatility and credit look constructive, while participation, small caps and rates do not.

That split is characteristic of a market in which headline indexes can remain firm without broad confirmation.

Educational Summary

Friday weakened the quality of Thursday's repair without reversing it completely.

The sequence now reads:

September 16: Fed tightening and weak participation reinforced Defensive conditions.
September 17: broad price, breadth, volatility and rates improvement moved the regime to Neutral.
September 18: technology extended higher, but broad participation deteriorated again and Treasury yields returned to approximately 5%.

The horizon split is:

Primary trend: positive.
Intermediate condition: mixed and fragile.
Short-term condition: bifurcated — positive in large-cap technology, weak in broad/equal-weight and small-cap equities.

Current conclusion

NEUTRAL — Moderate-High confidence — Mixed

The market is not Defensive enough to override the combination of positive primary trends, strong technology leadership, low volatility and tight credit. It is also not Risk-On because breadth and capitalization participation are too weak, small caps are lagging, and the rate backdrop remains restrictive.

The most useful characterization is a narrow large-cap growth advance inside a mixed broad-market environment. A durable improvement would normally be confirmed by equal-weight participation, stronger small-cap relative strength, broader sector leadership and easing long-term yields. Continued divergence between headline indexes and participation would instead leave the market increasingly dependent on a small leadership cohort.

Changelog

v0.4: reinforced no score carry-forward, available-weight disclosure, price-source exclusion rules, Markdown-only archival validation, and required provenance frontmatter.