# How Does Gamma Exposure Differ between Vanilla and Binary Options near Expiration? ▴ Question

**Published:** 2025-08-09
**Categories:** Question

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## Concept

The behavior of gamma, the second derivative of an option’s price with respect to the underlying asset’s price, presents one of the most profound operational distinctions between vanilla and [binary options](https://prime.greeks.live/area/binary-options/?utm_source=options.greeks.live&utm_medium=referral&utm_campaign=satellite), particularly as expiration looms. For a market maker or a sophisticated risk manager, this is not an academic point; it is the source of either manageable, flowing risk or a point of extreme, almost singular, volatility. The core difference is rooted in the very structure of their respective payoffs, which dictates a fundamentally divergent risk profile in the final hours and minutes of trading.

> The gamma profile of a vanilla option is a study in managed convexity, while a binary option’s gamma represents a digital cliff, a sudden and absolute state change.

A [vanilla option](https://prime.greeks.live/question/can-the-payoff-structure-of-a-vanilla-option-straddle-be-replicated-with-binary-options/?utm_source=options.greeks.live&utm_medium=referral&utm_campaign=satellite)’s gamma profile is characterized by a smooth, bell-shaped curve. Gamma is at its peak when the option is precisely at-the-money (ATM), meaning the underlying asset’s price equals the [strike price](https://prime.greeks.live/guide/strike-price-selection-a-masterclass-in-balancing-cost-and-protection/?utm_source=options.greeks.live&utm_medium=referral&utm_campaign=satellite). As the underlying price moves away from the strike, either in-the-money (ITM) or out-of-the-money (OTM), the gamma gradually decays. This behavior is intuitive; the rate of change of the option’s delta is highest when the outcome is most uncertain.

As expiration approaches, this entire curve lifts upwards, signifying that the delta of an ATM option will change more rapidly for each dollar move in the underlying. Yet, even at its peak, the gamma of a vanilla option remains a continuous, manageable function. It represents an acceleration, but a predictable one.

Contrast this with the gamma profile of a [binary option](https://prime.greeks.live/question/can-the-greeks-from-traditional-option-pricing-be-applied-to-binary-options-strategy/?utm_source=options.greeks.live&utm_medium=referral&utm_campaign=satellite). A binary, or digital, option does not have a payout that scales with the underlying’s price movement past the strike. It has a discontinuous, all-or-nothing payoff ▴ if the option expires in-the-money by even the smallest fraction, it pays a fixed amount; if it expires out-of-the-money, it pays nothing. This structural reality creates a dramatically different gamma signature.

Away from the strike, a binary option’s gamma is negligible. However, as the underlying price converges on the strike price, and as time to expiration decays to zero, the gamma of a binary option explodes towards infinity. It is not a curve but a spike. This is because the option’s delta must transition from nearly zero (representing a low probability of finishing ITM) to nearly one (representing a high probability) over an infinitesimally small price range right at the strike. The rate of change of that delta, the gamma, becomes a point of violent transition, posing an extraordinary challenge for anyone tasked with hedging the position.

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## Strategy

The strategic implications of the differing gamma profiles between vanilla and binary options are profound, dictating entirely separate approaches to hedging, [risk management](https://prime.greeks.live/area/risk-management/?utm_source=options.greeks.live&utm_medium=referral&utm_campaign=satellite), and portfolio construction. The smooth, predictable nature of vanilla option gamma allows for systematic, flowing hedging strategies. The explosive, singular nature of binary option gamma, however, demands a strategy based on avoidance, premium capture, and an acceptance of unhedgeable basis risk near expiration.

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## The Continuous Hedge a Vanilla Framework

For a portfolio of [vanilla options](https://prime.greeks.live/area/vanilla-options/?utm_source=options.greeks.live&utm_medium=referral&utm_campaign=satellite), market makers engage in dynamic [delta hedging](https://prime.greeks.live/area/delta-hedging/?utm_source=options.greeks.live&utm_medium=referral&utm_campaign=satellite). As the underlying asset’s price moves, the portfolio’s net delta changes, a rate of change governed by its net gamma. The strategy is to continuously buy or sell the underlying asset to return the portfolio’s delta to neutral.

For instance, a market maker who is short a call option (and thus short delta and short gamma) will buy the underlying asset as its price rises to offset the increasingly negative delta. The positive gamma of a long option position is often referred to as a “friend” to the trader, as it means their delta becomes more long as the market rises and more short as it falls, creating a natural “buy low, sell high” effect during hedging, a process known as gamma scalping.

> Managing vanilla gamma is a process of continuous adjustment and flow, whereas managing binary gamma is an exercise in event risk mitigation.

This system works because the gamma is a known, continuous quantity. Risk systems can model it accurately, and hedging costs are a function of the underlying’s realized volatility versus the implied volatility at which the option was sold. The strategy is one of process and flow management.

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## The Event Horizon a Binary Framework

Attempting to apply a continuous delta-hedging strategy to a binary option near expiration is operationally impossible and financially ruinous. As the underlying approaches the strike, the gamma spike means the required hedge adjustment becomes astronomically large for a minuscule price move. The delta can flip from 0.1 to 0.9 in the blink of an eye.

No manual or automated hedging system can keep up with this instantaneous change. The transaction costs and market impact of attempting to execute such a large hedge in a short time would be catastrophic.

Consequently, the strategies for managing binary option risk are fundamentally different:

- **Premium and Volatility Pricing** ▴ Dealers must price the extreme hedging risk into the binary option’s premium. This often involves charging a significant spread or a higher implied volatility than for a comparable vanilla option. The price reflects the acceptance of a period of unhedgeable risk.

- **Position Netting and Limits** ▴ The primary strategy is to avoid having a large net position in a single binary strike near expiration. Dealers will try to match buyers and sellers to have as little [net exposure](https://prime.greeks.live/area/net-exposure/?utm_source=options.greeks.live&utm_medium=referral&utm_campaign=satellite) as possible. Strict, system-enforced position limits are placed on traders for binary options nearing their expiry.

- **Using Vanilla Spreads as Proxies** ▴ A common institutional strategy to gain or hedge a binary-like exposure is to use a very tight, at-the-money [vertical spread](https://prime.greeks.live/area/vertical-spread/?utm_source=options.greeks.live&utm_medium=referral&utm_campaign=satellite) with vanilla options. For example, buying a $100 call and selling a $101 call creates a payoff that closely mimics a binary option with a $100 strike. While this position still has high gamma, it is distributed over the $1 width of the spread, making it a curve rather than a spike and thus significantly more manageable to hedge.

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## Comparative Strategic Stance

The table below outlines the core strategic differences in managing exposure to these two instrument types, particularly from the perspective of a risk manager or dealer.

| Strategic Consideration | Vanilla Options | Binary Options |
| --- | --- | --- |
| Primary Hedging Method | Dynamic Delta Hedging (Continuous) | Position Netting & Use of Proxies (Pre-emptive) |
| Risk Profile | Manageable Convexity (Flow Risk) | Discontinuous Payout (Event Risk) |
| Gamma Behavior | Smooth, bell-shaped curve, peaks at-the-money. | Negligible, then spikes towards infinity at the strike near expiry. |
| Cost of Hedging | Function of realized vs. implied volatility. Manageable via gamma scalping. | Potentially infinite at the strike. Hedging costs are priced in upfront. |
| Operational Focus | Maintaining delta neutrality through continuous trading. | Enforcing strict position limits and avoiding net exposure near expiry. |
| System Requirements | Real-time delta and gamma calculation, automated hedging engine. | Pre-trade limit checking, exposure aggregation, and scenario analysis. |

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## Execution

The execution of risk management protocols for vanilla and binary options diverges most sharply at the quantitative and operational levels. While the concept and strategy highlight a difference in kind, the execution details reveal a difference in magnitude that has profound implications for trading systems, risk models, and the procedural discipline required of a trading desk.

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## Quantitative Modeling the Greek Formulary

The fundamental divergence in gamma behavior is rooted directly in the mathematical formulas derived from their respective pricing models. For a European option within a Black-Scholes framework, the differences are stark.

The gamma for a **vanilla call or put option** is identical and given by:

_Γvanilla = ( N'(d1) ) / ( Sσ√T )_

Where:

- **S** is the underlying asset price.

- **σ** is the volatility of the underlying.

- **T** is the time to expiration in years.

- **N'(d1)** is the probability density function of the standard normal distribution for the term d1. This term gives the gamma its characteristic bell shape, peaking when S=K (the strike price).

The gamma for a **cash-or-nothing binary call option** is given by:

_Γbinary = ( -d1 N'(d2) ) / ( S2σ2T )_

Where:

- **d2** = d1 – σ√T

- The other terms are as defined above.

The critical element in the binary formula is the presence of _T_ in the denominator. As time to expiration (T) approaches zero, the entire expression explodes, creating the infinite gamma spike at the precise moment the underlying price (S) equals the strike price (K).

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## Predictive Scenario Analysis Gamma Values near Expiration

To illustrate this, consider an underlying asset trading at $100 with a volatility of 20%. We will compare the gamma of at-the-money ($100 strike) vanilla and binary options at various times to expiration.

| Days to Expiration (DTE) | Vanilla Option Gamma (at $100 Strike) | Binary Option Gamma (at $100 Strike) |
| --- | --- | --- |
| 30 | 0.068 | -0.015 |
| 10 | 0.118 | -0.082 |
| 5 | 0.167 | -0.231 |
| 1 | 0.373 | -2.580 |
| 0.1 (approx. 2.4 hours) | 1.179 | -81.59 |
| 0.01 (approx. 15 minutes) | 3.729 | -8158.7 |

The table demonstrates the core operational challenge. While the vanilla gamma increases, it remains within a manageable order of magnitude. The binary gamma, however, becomes absurdly large, indicating that an infinitesimal move in the underlying would necessitate a colossal, and practically impossible, hedging transaction. The negative sign on the binary gamma at-the-money is also revealing; it shows the rate of change of delta is at its most extreme negative point, right before it flips positive on the other side of the strike.

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## The Operational Playbook for Binary Option Risk

Given the impossibility of [dynamic hedging](https://prime.greeks.live/area/dynamic-hedging/?utm_source=options.greeks.live&utm_medium=referral&utm_campaign=satellite), a trading firm’s execution protocol must focus on pre-emptive control and risk mitigation. This is a procedural discipline enforced by the risk management system.

- **Exposure Identification and Tagging** ▴ All binary option positions must be flagged within the risk system. Any position with an expiration within a pre-defined window (e.g. 72 hours) is escalated to a high-alert status.

- **Strike-Level Aggregation** ▴ The system must aggregate all binary positions on a per-strike, per-expiration basis. The critical metric is the net notional amount at risk at each specific strike price.

- **Scenario Stress-Testing** ▴ The risk system must run automated, frequent scenario analyses. Specifically, it calculates the portfolio’s P&L and required hedge adjustment if the underlying price were to move +/- 0.1% across each binary strike. This reveals the “jump risk” exposure.

- **Enforcement of Hard Limits** ▴ Automated pre-trade checks must prevent any new trade that would increase the net exposure of a specific binary strike beyond a hard-coded, low threshold within the high-alert time window. Overrides must require manual approval from senior risk officers.

- **[Pin Risk](https://prime.greeks.live/area/pin-risk/?utm_source=options.greeks.live&utm_medium=referral&utm_campaign=satellite) Analysis** ▴ The system must calculate the total settlement payout if the underlying were to fix exactly on the strike price. This “pin risk” is a major operational and financial concern, as it can lead to disputes and settlement failures.

- **Proxy Hedging Calculation** ▴ For any unavoidable net exposure, the system should calculate the equivalent vanilla vertical spread that would best replicate the payoff and display its associated (and more manageable) greeks to the trader for potential hedging activity.

> Effective execution for binary options is not about managing the gamma; it is about architecting a system that makes the gamma irrelevant by controlling the exposure to zero.

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## References

- Natenberg, Sheldon. “Option Volatility and Pricing ▴ Advanced Trading Strategies and Techniques.” McGraw-Hill Education, 2015.

- Hull, John C. “Options, Futures, and Other Derivatives.” Pearson, 2022.

- Taleb, Nassim Nicholas. “Dynamic Hedging ▴ Managing Vanilla and Exotic Options.” Wiley, 1997.

- Gatheral, Jim. “The Volatility Surface ▴ A Practitioner’s Guide.” Wiley, 2006.

- Sinclair, Euan. “Volatility Trading.” Wiley, 2013.

- Lipton, Alexander. “Mathematical Methods for Foreign Exchange ▴ A Financial Engineer’s Approach.” World Scientific, 2001.

- Wilmott, Paul. “Paul Wilmott on Quantitative Finance.” Wiley, 2006.

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## Reflection

Understanding the mathematical and strategic divergence between vanilla and binary gamma is a foundational step. The ultimate challenge, however, lies in embedding this understanding into the very architecture of a firm’s risk management and execution systems. It requires a shift from thinking about risk as a continuous variable to be managed, to seeing certain exposures as discrete events to be systematically neutralized.

The behavior of a binary option near its death is a stark reminder that in financial markets, the most profound risks often lie not in the predictable center of the curve, but at the knife’s edge of a discontinuity. The robustness of an operational framework is truly tested by its ability to handle these tail events, transforming a potential crisis into a managed, non-event through disciplined, system-level controls.

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## Glossary

<a href="https://prime.greeks.live/area/binary-options/?utm_source=options.greeks.live&utm_medium=referral&utm_campaign=satellite" class="glossary-item-box">
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## Binary Options

Meaning ▴ Binary Options are a type of financial derivative where the payoff is either a fixed monetary amount or nothing at all, contingent upon the outcome of a "yes" or "no" proposition regarding the price of an underlying asset. </a><a href="https://prime.greeks.live/question/can-the-payoff-structure-of-a-vanilla-option-straddle-be-replicated-with-binary-options/?utm_source=options.greeks.live&utm_medium=referral&utm_campaign=satellite" class="glossary-item-box">
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## Vanilla Option

A straddle's payoff can be synthetically replicated via a ladder of binary options, trading execution simplicity for granular risk control. </a><a href="https://prime.greeks.live/guide/strike-price-selection-a-masterclass-in-balancing-cost-and-protection/?utm_source=options.greeks.live&utm_medium=referral&utm_campaign=satellite" class="glossary-item-box">
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## Strike Price

Master strike price selection to balance cost and protection, turning market opinion into a professional-grade trading edge. </a><a href="https://prime.greeks.live/question/can-the-greeks-from-traditional-option-pricing-be-applied-to-binary-options-strategy/?utm_source=options.greeks.live&utm_medium=referral&utm_campaign=satellite" class="glossary-item-box">
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## Binary Option

The principles of the Greeks can be adapted to binary options by translating them into a probabilistic risk framework. </a><a href="https://prime.greeks.live/area/risk-management/?utm_source=options.greeks.live&utm_medium=referral&utm_campaign=satellite" class="glossary-item-box">
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## Risk Management

Meaning ▴ Risk Management, within the cryptocurrency trading domain, encompasses the comprehensive process of identifying, assessing, monitoring, and mitigating the multifaceted financial, operational, and technological exposures inherent in digital asset markets. </a><a href="https://prime.greeks.live/area/vanilla-options/?utm_source=options.greeks.live&utm_medium=referral&utm_campaign=satellite" class="glossary-item-box">
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## Vanilla Options

Meaning ▴ Vanilla Options, in the context of crypto institutional options trading, refer to the most fundamental and straightforward type of options contract, typically either a call or a put, with standard characteristics. </a><a href="https://prime.greeks.live/area/delta-hedging/?utm_source=options.greeks.live&utm_medium=referral&utm_campaign=satellite" class="glossary-item-box">
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## Delta Hedging

Meaning ▴ Delta Hedging is a dynamic risk management strategy employed in options trading to reduce or completely neutralize the directional price risk, known as delta, of an options position or an entire portfolio by taking an offsetting position in the underlying asset. </a><a href="https://prime.greeks.live/area/net-exposure/?utm_source=options.greeks.live&utm_medium=referral&utm_campaign=satellite" class="glossary-item-box">
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## Net Exposure

Meaning ▴ Net Exposure, within the analytical framework of institutional crypto investing and advanced portfolio management, quantifies the aggregate directional risk an investor holds in a specific digital asset, asset class, or market sector. </a><a href="https://prime.greeks.live/area/vertical-spread/?utm_source=options.greeks.live&utm_medium=referral&utm_campaign=satellite" class="glossary-item-box">
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## Vertical Spread

Meaning ▴ A Vertical Spread, in the context of crypto institutional options trading, is a precisely structured options strategy involving the simultaneous purchase and sale of two options of the same type (either both calls or both puts) on the identical underlying digital asset, sharing the same expiration date but possessing distinct strike prices. </a><a href="https://prime.greeks.live/area/dynamic-hedging/?utm_source=options.greeks.live&utm_medium=referral&utm_campaign=satellite" class="glossary-item-box">
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## Dynamic Hedging

Meaning ▴ Dynamic Hedging, within the sophisticated landscape of crypto institutional options trading and quantitative strategies, refers to the continuous adjustment of a portfolio's hedge positions in response to real-time changes in market parameters, such as the price of the underlying asset, volatility, and time to expiration. </a><a href="https://prime.greeks.live/area/pin-risk/?utm_source=options.greeks.live&utm_medium=referral&utm_campaign=satellite" class="glossary-item-box">
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## Pin Risk

Meaning ▴ Pin risk is a specific form of options trading risk that emerges at expiration when the underlying asset's price closes exactly at or very close to an option's strike price. </a>

**Tags:** [Vanilla Options](https://options.greeks.live/area/vanilla-options/), [Quantitative Finance](https://options.greeks.live/area/quantitative-finance/), [Dynamic Hedging](https://options.greeks.live/area/dynamic-hedging/), [Gamma Exposure](https://options.greeks.live/area/gamma-exposure/), [Market Microstructure](https://options.greeks.live/area/market-microstructure/), [Net Exposure](https://options.greeks.live/area/net-exposure/)	

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- 
### [How Does the Integration of Stochastic Volatility Impact the Pricing of Long-Dated Crypto Options?](https://options.greeks.live/question/how-does-the-integration-of-stochastic-volatility-impact-the-pricing-of-long-dated-crypto-options/)
![Sleek, metallic, modular hardware with visible circuit elements, symbolizing the market microstructure for institutional digital asset derivatives. This low-latency infrastructure supports RFQ protocols, enabling high-fidelity execution for private quotation and block trade settlement, ensuring capital efficiency within a Prime RFQ.](https://options.greeks.live/wp-content/uploads/2025/08/market-microstructure-engine-for-crypto-derivatives-rfq-protocol.jpg)

Stochastic volatility models are crucial for long-dated crypto options, enabling precise pricing and risk management through dynamic volatility capture.

- 
### [What Are the Key Indicators to Watch When Trading Crypto Options?](https://options.greeks.live/question/what-are-the-key-indicators-to-watch-when-trading-crypto-options/)
![A dark, textured module with a glossy top and silver button, featuring active RFQ protocol status indicators. This represents a Principal's operational framework for high-fidelity execution of institutional digital asset derivatives, optimizing atomic settlement and capital efficiency within market microstructure.](https://options.greeks.live/wp-content/uploads/2025/07/institutional-digital-asset-derivatives-rfq-protocol-execution-interface-1.jpg)

Leveraging implied volatility, open interest, put-call ratio, and Greeks offers a systemic advantage for precise risk management and superior execution in crypto options.

- 
### [What Are the Technological Requirements for Building a Low-Latency Crypto Options Data Pipeline?](https://options.greeks.live/question/what-are-the-technological-requirements-for-building-a-low-latency-crypto-options-data-pipeline/)
![A glowing central ring, representing RFQ protocol for private quotation and aggregated inquiry, is integrated into a spherical execution engine. This system, embedded within a textured Prime RFQ conduit, signifies a secure data pipeline for institutional digital asset derivatives block trades, leveraging market microstructure for high-fidelity execution.](https://options.greeks.live/wp-content/uploads/2025/07/digital-asset-derivatives-rfq-system-for-institutional-high-fidelity-execution.jpg)

A low-latency crypto options data pipeline delivers instantaneous, high-fidelity market intelligence for decisive execution.

- 
### [What Are the Key Data Inputs for Predicting Quote Expiry in Options Markets?](https://options.greeks.live/question/what-are-the-key-data-inputs-for-predicting-quote-expiry-in-options-markets/)
![Curved, segmented surfaces in blue, beige, and teal, with a transparent cylindrical element against a dark background. This abstractly depicts volatility surfaces and market microstructure, facilitating high-fidelity execution via RFQ protocols for digital asset derivatives, enabling price discovery and revealing latent liquidity for institutional trading.](https://options.greeks.live/wp-content/uploads/2025/07/optimized-rfq-protocol-dynamics-for-institutional-crypto-derivatives.jpg)

Accurate options expiry prediction demands integrating underlying asset data, implied volatility surfaces, and market microstructure for superior execution.

- 
### [How Does Gamma Risk Differ Fundamentally between Vanilla and Binary Options?](https://options.greeks.live/question/how-does-gamma-risk-differ-fundamentally-between-vanilla-and-binary-options/)
![A teal and white sphere precariously balanced on a light grey bar, itself resting on an angular base, depicts market microstructure at a critical price discovery point. This visualizes high-fidelity execution of digital asset derivatives via RFQ protocols, emphasizing capital efficiency and risk aggregation within a Principal trading desk's operational framework.](https://options.greeks.live/wp-content/uploads/2025/07/precision-institutional-digital-asset-derivatives-rfq-execution-strategy.jpg)

Vanilla option gamma represents manageable, continuous risk, while binary option gamma creates an explosive, event-driven risk singularity.

- 
### [Why Does a Simple Delta Hedging Strategy Fail for a Portfolio of Binary Options Nearing Expiration?](https://options.greeks.live/question/why-does-a-simple-delta-hedging-strategy-fail-for-a-portfolio-of-binary-options-nearing-expiration/)
![A sophisticated, symmetrical apparatus depicts an institutional-grade RFQ protocol hub for digital asset derivatives, where radiating panels symbolize liquidity aggregation across diverse market makers. Central beams illustrate real-time price discovery and high-fidelity execution of complex multi-leg spreads, ensuring atomic settlement within a Prime RFQ.](https://options.greeks.live/wp-content/uploads/2025/07/institutional-grade-rfq-protocol-facilitating-atomic-settlement-and-high-fidelity-execution-of-multi-leg-spreads.jpg)

A simple delta hedge fails for binary options near expiry because their Gamma approaches infinity, making the required hedging adjustments impossibly large and frequent.

- 
### [How Does a Hybrid Strategy Mitigate Model Risk Compared to a Purely Dynamic Approach?](https://options.greeks.live/question/how-does-a-hybrid-strategy-mitigate-model-risk-compared-to-a-purely-dynamic-approach/)
![Smooth, layered surfaces represent a Prime RFQ Protocol architecture for Institutional Digital Asset Derivatives. They symbolize integrated Liquidity Pool aggregation and optimized Market Microstructure. Two spheres illustrate Atomic Settlement of a Multi-Leg Spread, reflecting High-Fidelity Execution.](https://options.greeks.live/wp-content/uploads/2025/07/market-microstructure-rfq-protocols-for-digital-asset-derivatives.jpg)

A hybrid strategy layers static hedges onto dynamic adjustments, reducing model dependency and insulating a portfolio from non-linear tail risks.

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---

**Original URL:** https://options.greeks.live/question/how-does-gamma-exposure-differ-between-vanilla-and-binary-options-near-expiration/
