Structural Calm, Embedded Convexity

Macroeconomic Context

22–29 September 2025

  • Federal Reserve / Powell: Markets digested Powell’s remarks hinting at a “higher-for-longer” stance despite slowing growth. The Fed’s cautious tone maintained pressure on rates-sensitive assets.

  • J.P. Morgan Hedged Equity Roll: The quarterly collar roll (short call/long put spread) added incremental supply to downside vol while capping upside, a structural flow that influenced near-dated skew.

  • AI-driven Overvaluations: US tech valuations remain stretched, particularly in AI-linked equities, where implied multiples continue to price in long-dated growth that looks vulnerable in higher-rate regimes.

  • Mortgage & Debt Pressures: Mortgage delinquencies and consumer credit stress indicators ticked higher. This reinforces the embedded macro risk premium in the vol surface despite muted realised moves.

  • Global Risk Sentiment: Elevated geopolitical tensions and weaker EM currencies contributed to persistent demand for convexity, even as spot indices grind higher.

Strategy-Specific Observations

1. Market Maker Positioning

  • Near-term positioning has decayed materially, with little residual influence left from prior hedges.

  • Current positioning has largely decayed. The upper collar of JPM’s hedged equity fund sits at 6,505, but with expiry tomorrow that strike has already been discounted. 

  • The key focus now is on tracking the flow into the new collar — tomorrow’s roll will determine the next relevant strikes and positioning dynamics. 

Market Maker Positioning

Graph 1 – Market Maker Positioning

2. Realised Volatility Term Structure

Short-term realised vol collapsed:

  • 3-day: 7.26% | 38th percentile

  • 10-day: 6.54% | 11th percentile

  • 21-day: 7.33% | 9th percentile

Long-term vol remains sticky:

  • 126-day: 23.21% | 83rd percentile

  • 252-day: 19.20% | 67th percentile

1 Year Rolling Realised Volatility

Graph 2 – 1-Year Rolling Realised Volatility

Takeaway: Realised vol continues to compress but appears to have found a floor. While the VIX term structure remains in healthy contango, standalone vol or protection buying here does not make sense as a speculative trade. The beta and OLS measures in the following charts support this view.

3. Elasticity Estimates

63-day rolling elasticity remains deeply negative on OLS measures, indicating that the VIX/SPX relationship has weakened. This dynamic makes spot-up/vol-up scenarios increasingly plausible — an important shift for convexity-based positioning. 

63-Day Rolling Elasticity Estimates

Graph 3 – 63-Day Rolling Elasticity Estimates

4. Skew & Risk Reversals

SPX skew remains extreme:

  • 10D put skew: 94th percentile

  • 25D put skew: 93rd percentile

  • 25D risk reversal: 74th percentile

By contrast, VIX skew prints in the lower terciles (25D RR only 28th percentile).

Fixed 3 month maturity Skew & Risk Reversals

Graph 4 – Fixed 3-Month Maturity Skew & Risk Reversals

Implication: Equity downside protection remains expensive. 

5. Rolling Beta

  • The VIX–SPX beta has trended upwards since mid-May and more recently early September, suggesting that volatility may have found a floor. 

  • At the same time, skew shows that downside protection remains expensive. 

Rolling Beta

Graph 5 – Rolling Beta

Our take

If unhedged, it is more efficient to consider put spreads rather than outright naked puts (long 25 D puts short 10 D puts).

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