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ATM calendars involve selling a short-term option (typically expiring the week of earnings) while buying a longer-term option (usually one to two weeks further out) at the same strike. The strategy profits from:
The rapid decay in the front leg post-earnings
The retention of value in the back leg
IV skew that favors premium retention
Correct calendar type selection (call vs. put) is critical for optimal profitability, and this framework provides the logic behind those decisions.
Optimal Expiration Pairing
Front-leg: Earnings week (ideally expires within 2-3 days post-report)
Back-leg: 1 to 2 weeks further out
This spacing allows for a steep IV crush in the front-leg, while retaining elevated implied volatility in the back-leg, enhancing spread profitability.
Utilizing aces in your trading strategy can enhance your understanding of market behavior.
Additionally, understanding how ACES can influence market sentiment is essential for traders.
Rationale: When options are overpriced versus realized historical moves, the IV crush will benefit the trade
Criteria 2: Stock Position Within Expected Move (EM) Range
Near Upper Range: Suggests downside reversion; favor ATM Put Calendars
Near Lower Range: Indicates upside potential; favor ATM Call Calendars
Centered in Range: Neutral bias; default to ATM Call Calendar for better liquidity
Criteria 3: Front-Month IV Skew
Put IV > Call IV: Reflects downside fear; favor Put Calendar
Call IV > Put IV: Indicates bullish expectations; favor Call Calendar
Balanced (<2%): Neutral bias; favor Call Calendar for execution ease
Criteria 4: Liquidity and Spread Quality
Tighter Call Spreads: Favor Call Calendars for lower slippage
Tighter Put Spreads: Prefer Put Calendars if overall setup aligns
Both Spreads >10%: Avoid trade due to excessive slippage risk
Criteria 5: Market Sentiment and Sector Context
Bullish Run-up: Calls generally bid up; favor Call Calendar
Fear-driven Sell-off: Put IV expands; favor Put Calendar
Tech/Growth Stocks: Calls typically liquid and IV-heavy; favor Call Calendar
Criteria 6: Dark Pool and Institutional Flow Levels
Buy Zone Activity: Favor Call Calendar (suggests support post-earnings)
Sell Zone Activity: Favor Put Calendar (risk of distribution post-earnings)
Neutral Flow: Default to Call Calendar due to better fills
Criteria 7: GEX/DEX Hedging Environment
High Positive GEX: Indicates suppressed volatility and range-bound price action; favors theta-based Call Calendar
High Negative GEX: Potential for IV expansion; Put Calendars can benefit from post-event move
Profit Management Guidelines
Profit Target: 30–50% of maximum profit
Ideal Exit Window: After IV collapse, typically within 24–48 hours post-earnings
Avoid Holding to Expiration: Decay curve flattens, reducing profit potential
Risk Management Considerations
Wide Spreads: Avoid illiquid setups
Low IV Differential: Reduces edge; skip trade if EM ≤ HM
Event Surprise Risk: Be cautious on heavily hyped or binary-report names (e.g., biotech, speculative tech)
Educational Add-on: Understanding Implied Volatility and Term Structure
Implied volatility (IV) represents the market’s expectation of future volatility. Around earnings, front-month IV spikes due to uncertainty, while longer-dated options typically remain more stable. Calendar spreads aim to sell high front IV and buy relatively lower (or stable) back-month IV. This IV differential, when exploited correctly, results in profits as the front-month IV collapses post-event while the back-month retains value.
The term structure of volatility is critical. Traders should look for a steep IV curve where the short-dated IV is significantly higher than the back-dated IV. This setup provides an edge because the short leg loses value faster after earnings. Platforms that chart IV term structures—like MenthorQ or OptionsAnalytix—are invaluable for identifying this skew.
Profit-taking guidelines recommend exiting once 30–50% of maximum potential profit is achieved or if IV collapses as expected. It is crucial not to hold to expiration to avoid gamma risk and post-event drift. ACES also flags setups with caution symbols (⚠) if they carry added risks like low liquidity, tight IV skew, or inconsistent dark pool flow.
Finally, integrating order flow data such as dark pool levels and gamma exposure (GEX/DEX) offers further confirmation. High positive GEX supports muted movement post-event, benefiting theta capture via call calendars, while negative GEX expands volatility, making put calendars more effective.
With a systematic approach, ACES empowers traders to quantify edge and navigate earnings with precision. Combining volatility analysis with order flow and positioning insights is key to consistent performance.
Conclusion: The ACES framework turns earnings trading into a disciplined, data-driven process. By filtering trades through multiple dimensions—volatility structure, sentiment, positioning, and flow—traders can target setups with asymmetric risk-reward. The real edge lies in combining these tools with seasoned discretion and tactical exits. Used correctly, ATM calendars offer consistent returns while mitigating large directional bets during volatile earnings cycles.
Conclusion
The ACES ATM Calendar framework empowers traders with a disciplined, data-driven strategy for navigating earnings setups. By assessing IV dynamics, historical behavior, and market structure, traders can increase the probability of consistent outcomes. ATM Calendars work best when supported by multiple criteria aligning in one direction—either call or put. Avoid trades when the data is inconclusive or risk-reward is compromised due to liquidity or extreme sentiment.
This systematic structure ensures each calendar trade is grounded in statistical edge, not speculation, allowing for sustained performance through earnings season and beyond.
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