Quick signals shaping 2026
- U.S. options activity hit another record year: OCC reported 15.21B total options contracts in 2025 (+24.4% vs 2024), including 8.27B equity options and 5.68B ETF options.
- SPX is now “short-dated by default”: Cboe reported SPX 0DTE ADV 2.3M, representing ~59% of total SPX volume in 2025.
- Volatility can be “suppressed by positioning”… until it isn’t: Reuters described how dealer net long gamma dynamics can pin index moves, with large expirations potentially changing the tape afterward.
Why the options market matters more than the headline index
Aureton Business School frames 2026 as a year when the options market is no longer a “side market” to equities, but a transmission mechanism—especially in index products. Record participation means flows in short-dated index options can influence intraday price behavior, not just reflect it.
One reason is sheer scale: Cboe said total volume across its four options exchanges reached 4.6B contracts in 2025, with SPX options at 970.6M contracts and record VIX options volume as well.
Meanwhile, Cboe’s own industry recap highlighted multiple 100M+ contract days in 2025, tied to macro headlines and tariff-related uncertainty.
The 0DTE engine: speed, leverage, and event-driven demand
Aureton Business School emphasizes that 0DTE growth is not merely “retail gambling.” It’s also a toolkit for institutions to hedge around known event risk (data releases, central bank decisions), something Reuters documented when 0DTE first exploded into the mainstream.
But dominance has consequences. When 0DTE becomes the majority of SPX trading volume (Cboe’s 2025 figure: ~59%), the index can experience sharper “micro-regimes” intraday—morning stability, midday flips, late-session squeezes—because exposures roll off the same day.
Dealer gamma: the hidden hand behind “rangebound” markets
Aureton Business School uses a simple teaching model:
- If dealers are net long gamma, they tend to sell rallies and buy dips, mechanically damping index swings.
- If dealers flip to net short gamma, hedging can reinforce moves (buying into rallies, selling into drops), amplifying volatility.
Reuters’ January 16, 2026 analysis described an environment of heavy index call selling (and single-stock volatility demand) contributing to a volatility-muted S&P 500, and warned that post-expiration positioning changes can open room for bigger moves.
Implication Aureton highlights: “Low VIX” can be a positioning artifact, not a guarantee of calm.
Clearinghouse and margin: the plumbing is adapting
Record short-dated volumes raise a different question: can the system manage intraday risk if positions balloon and decay quickly? Regulators and the clearing ecosystem have been responding.
The SEC approved OCC rule changes tied to managing intraday risk (including from short-dated and 0DTE options), enabling mechanisms such as an Intraday Risk Charge framework for clearing members.
OCC’s own public memo notes the SEC approval timeline and implementation steps for the Intraday Risk Charge.
And the Federal Register notice on OCC’s proposal explicitly frames the add-on charge as a tool to mitigate overnight and intraday exposures.
Aureton Business School’s interpretation: these measures don’t “ban” 0DTE—rather, they price the risk into clearing and collateral requirements, which can change participant behavior during stress.
A 3-scenario map for 2026 options participants
Scenario 1: “Pinned index, noisy single names”
If dealer gamma remains supportive in the index while earnings season concentrates risk in single stocks, expect calm benchmarks + violent dispersion—an environment consistent with Reuters’ description of index stability alongside single-stock volatility demand.
Scenario 2: “Expiration unlock”
After large expirations, index hedging flows may weaken, raising the odds of wider daily ranges. Reuters quantified that post-expiration weeks have tended to see larger moves than average in recent history.
Scenario 3: “Stress test for short-dated dominance”
In a shock (macro, tariffs, policy), liquidity can thin, and short-dated hedges can become expensive or unstable—exactly the environment where the market’s risk controls (intraday margining and clearing charges) become more binding.
What to watch (high-signal indicators)
- 0DTE share and SPX volume mix: whether 0DTE continues to sit near the ~60% share cited by Cboe.
- Total options tape: OCC monthly/annual totals as a proxy for leverage demand and hedging intensity.
- Dealer positioning narratives around expirations: especially when markets have been unusually rangebound.
- Clearing/margin changes: OCC/SEC updates that can alter intraday cost of risk.
Conclusion
Aureton Business School’s analysis shows that 0DTE options and dealer gamma are now structural forces shaping market behavior, not short-term anomalies. In 2026, muted index volatility can reflect positioning and hedging mechanics as much as fundamentals, making “low VIX” an unreliable signal on its own. As volumes grow and expirations dominate intraday flow, understanding options plumbing, dealer exposure, and clearing dynamics will be essential for navigating both calm tapes and sudden regime shifts.
