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Home/Volatility Analysis/September 23, 2026
CONVEXA STRATEGY

Volatility and Options

For the trading session ended September 23, 2026

1. Short-Dated Volatility

VIX15.18
VXN20.76
VIX9D13.46
VVIX88.60
MetricSep 22Sep 23Change
VIX14.2115.18+6.83%
VXN20.1820.76+2.87%
VIX9D12.1913.46+10.42%
VVIX83.1788.60+6.53%

The strongest percentage move came in VIX9D, indicating that the immediate event and macro horizon repriced more quickly than longer maturities.

VVIX also rose meaningfully, showing increased demand for convexity on volatility itself.

Short-volatility diagnosis: near-term volatility pressure increased, but the absolute level of VIX remained moderate.

2. Long-Dated Volatility and Term Structure

MetricSep 22Sep 23Change
VIX3M17.6118.11+2.84%
VIX6M19.7920.11+1.62%

Term structure:

`VIX 15.18 < VIX3M 18.11 < VIX6M 20.11`

The curve remained upward sloping.

That configuration is inconsistent with acute near-term panic. It indicates that the market continues to assign more volatility to the medium-term macro and political horizon than to the immediate session window.

Long-volatility diagnosis: long-dated volatility rose, but less aggressively than short-dated volatility, preserving a conventional contango structure.

3. Nasdaq Volatility and the QQQ Surface

QQQ closed at 741.21, down 0.84%.

VXN closed at 20.76, up 2.87%.

Twenty-session realized QQQ volatility is approximately 16.6% annualized.

Using VXN as the broad Nasdaq implied-volatility proxy, implied volatility remains approximately 4.1 volatility points above recent realized volatility.

That is a positive implied-versus-realized premium.

January 15, 2027 QQQ Surface — Calculated Estimates

The following values are calculated implied-volatility estimates derived from observed option mid-prices using a standard option-pricing framework. They are analytical estimates, not direct exchange-published IV marks.

ContractEstimated IV
600 put30.0%
650 put26.2%
700 put23.0%
750 put20.7%
750 call20.8%
800 call19.1%
850 call18.6%
900 call19.0%

The downside wing remains materially more expensive than the upside wing.

The upper call wing remains relatively firm rather than collapsing, but the dominant structural feature is conventional downside skew.

SKEW increased from 144.80 to 146.15, a rise of approximately 0.93%.

Surface diagnosis: downside-tail pricing remained elevated and increased modestly, while the upper call wing continued to retain non-trivial volatility premium.

4. Option Flows, Gamma and Market Microstructure

A complete, independently verified September 23 session-level QQQ put/call premium breakdown was not available in the approved source set at the time of preparation.

Accordingly, no session-level option-flow totals are published in this report.

The same discipline applies to aggregate dealer gamma. Public market data are insufficient to reconstruct the sign and size of dealer gamma reliably after the close.

No dealer-gamma sign is assigned.

5. Drivers of the Change in Volatility

The September 23 volatility expansion coincided with:

  • S&P 500 down 0.75%;
  • Nasdaq-100 down 0.85%;
  • QQQ down 0.84%;
  • 10-year Treasury yield rising to 5.106%;
  • flash U.S. Composite PMI rising to 58.4;
  • Federal Reserve rhetoric favoring further tightening;
  • Brent crude rising 3.86%;
  • deteriorating market breadth;
  • ongoing U.S.–Iran geopolitical risk;
  • the start of the U.S.–China summit window.

The move therefore had a clear macro-rates-energy foundation rather than being an isolated options-market event.

6. Final Diagnosis of the Day

September 23 was a controlled volatility expansion session.

Short volatility rose:

  • VIX higher;
  • VIX9D higher;
  • VVIX higher.

Nasdaq volatility also rose, with VXN above 20.

Long volatility increased more slowly, preserving contango.

Tail pricing remained elevated, with SKEW rising to 146.15 and the January QQQ downside wing retaining substantially higher implied volatility than the upside wing.

Final diagnosis: the market moved away from the previous session’s normalization toward a more defensive volatility regime, but the term structure remained orderly and did not signal acute systemic stress.

Concise Concluding Summary

Short-dated volatility: VIX 15.18; VIX9D 13.46; VVIX 88.60. All increased.

Nasdaq volatility: VXN 20.76 while QQQ fell 0.84%. Twenty-session QQQ realized volatility approximately 16.6%.

Long-dated volatility: VIX3M 18.11; VIX6M 20.11. Term structure remained in contango.

Surface: SKEW rose to 146.15. Calculated January QQQ IV ranged from about 30% at the 600 put to roughly 19% in the 800–900 call wing.

Option flows: No independently verified full-session QQQ premium-flow total is published.

Main conclusion: Volatility expanded across short, long and tail measures, but the curve remained orderly. The session represents a meaningful deterioration in the volatility backdrop without a transition into a crisis regime.