Whenever a major Bitcoin options expiration approaches, market participants often notice an unusual phenomenon: price volatility appears to be "pinned" by an unseen force. Whether the price tries to break out upward or downward, it tends to get pulled back repeatedly near key strike prices, struggling to form a sustained trend. This effect is especially pronounced in the lead-up to May 29, 2026—when roughly $6.25 billion in BTC options are set to expire on Deribit, with open interest heavily concentrated around the $75,000 and $80,000 strike prices.
This isn’t just a quirk of market psychology. Instead, it’s a structural outcome of the options market’s market maker hedging mechanisms. The so-called "gamma pinning" effect is fundamentally a byproduct of market makers managing their exposure toward neutrality: as expiration nears, market makers repeatedly buy and sell spot or futures to delta-hedge, exerting a gravitational pull on the price. Understanding this mechanism is essential for interpreting market behavior before and after major options expirations.
May 29 Options Expiry: $6.25 Billion in Highly Concentrated Positions
On May 29, 2026, Deribit will see a massive batch of Bitcoin options expire. According to platform data, a total of 80,535 contracts—representing a notional value of about $6.25 billion—are set to expire. The open interest distribution is sharply polarized:
Put options are most heavily concentrated at the $75,000 strike, with a notional value of roughly $394 million. Call options are most concentrated at the $80,000 strike, totaling about $532 million. Additionally, call options at the $82,000 strike have seen a surge in trading activity recently, with around 1,600 contracts traded this week (about $126 million notional), indicating that some market participants are betting on a breakout before expiration.
Overall, the put/call open interest ratio stands at about 0.86, reflecting a slightly bullish sentiment. The "max pain" point—where option buyers lose the most and sellers profit the most—is estimated to be near $75,000, below the current spot price.
At current levels, the standoff between $75,000 and $80,000, combined with the effects of gamma pinning, is structurally constraining short-term price action.
How the Gamma Mechanism Operates and Expiry Effects Accumulate
Options Gamma Exposure: The "Stabilizer" and "Amplifier" of Volatility
Gamma, a key Greek in options pricing, measures the rate of change of delta. For market makers, gamma exposure determines how they adjust their hedges as prices move.
There are two distinct gamma regimes in the market:
Long Gamma (Positive Gamma). When market makers are long gamma, a price drop triggers them to buy BTC as a hedge, while a price rise prompts them to sell. This contrarian hedging naturally dampens volatility, causing prices to "rebound" around key strike prices—this is the core of the gamma pinning effect.
Short Gamma (Negative Gamma). When market makers are short gamma, a price drop forces them to sell even more, while a price rise compels them to chase higher. This positive feedback loop amplifies volatility, leading to gamma squeezes.
Glassnode analysis has pointed out that there is significant negative gamma concentration near $75,000, creating a "magnetic point" effect at that level.
Gamma Evolution in the First Half of 2026
Leading up to the March 2026 quarterly options expiration, there was a notable short gamma structure near $75,000. Glassnode data showed about $2.1 billion in negative gamma concentrated at the $75,000 strike, with roughly $1.8 billion tied to the March expiry. As of the March 27 expiration, short gamma holdings near $75,000 totaled around $2.56 billion. Market maker hedging in this zone created a "gamma magnet" effect, pulling prices toward $75,000.
In April, the market structure shifted further toward a defensive stance. On Deribit, both put options around the $60,000 strike and call options around the $80,000 strike accumulated about $1.4 billion in notional value each, forming a heavily fortified range at both ends of the price spectrum. This "heavy positioning at both ends" suggests that major players are simultaneously hedging against both sharp declines and rapid rallies.
The Gamma Gravitational Field at $75K / $80K
Open Interest Concentration and Gamma Distribution
The concentrated open interest for the May 29 expiry provides a direct lens into the gamma pinning effect.
| Strike Price | Position Type | Notional Value | Inferred Gamma Direction |
|---|---|---|---|
| $75,000 | Put Options | ~$394 million | Negative Gamma Zone |
| $80,000 | Call Options | ~$532 million | Negative Gamma / Long Gamma Boundary |
| $82,000 | Call Options | ~$126 million (recent increase) | Positive Gamma Accumulation |
The $75,000 strike is not only the largest concentration for puts but also the max pain point. The abundance of puts compels market makers to adjust their hedges as prices approach this level, creating a gamma pull that draws prices toward it.
At $80,000, about $532 million in call open interest has accumulated. The gamma structure here is more complex—if market makers are short gamma above $80,000, a breakout could rapidly trigger a gamma squeeze; if they’re long gamma, a breakout might instead face selling pressure.
Historical Price Volatility Around Expiry
Statistical analysis provides historical validation for the gamma pinning effect. Past data shows that BTC volatility tends to drop significantly before major options expirations, only to surge after expiry.
| Metric | Data |
|---|---|
| Probability of volatility decline two weeks pre-major expiry | ~73% |
| Volatility drop before Dec 2023 expiry | ~41% |
| Volatility drop before Jun 2025 expiry | ~39% |
| Average rebound in 48 hours post-expiry | ~28% |
These historical figures cover major global BTC options expirations from 2019 through early 2026. Past cases also show that after the January 2024 expiry, BTC surged sharply within 72 hours, while after the June 2024 expiry, it saw a significant pullback. This highlights that post-expiry price direction depends heavily on the prevailing gamma imbalance.
This pattern aligns closely with the gamma pinning mechanism: before expiry, large open interest forces market makers to keep hedging, suppressing volatility; after settlement, hedges are unwound and the pent-up volatility is released.
Sentiment Breakdown: Institutional vs. Retail Positioning
The Bearish Defense Camp: "Smart Money" Prepares for Deep Corrections
In early April 2026, Deribit saw a surge in put buying, with total open interest in puts below $60,000 reaching about $1.44 billion—the highest across all strikes and maturities on the platform.
The main players behind this defensive positioning include Bitcoin ETF holders and treasury companies. They use long-dated puts (6- and 12-month maturities with strikes at or below $60,000) as portfolio insurance against a breach of that level.
The Bullish Aggressors: $82,000 Call Bets Heat Up
In contrast to the defensive puts, call options at $82,000 have seen brisk trading. The $82,000 call expiring May 29 is among the most actively traded contracts recently, with around 1,600 contracts changing hands (about $126 million notional).
The overall put/call ratio of 0.86 also reflects a slight bullish tilt.
The Core Divergence
The most notable structural divergence in today’s market is that institutions are systematically hedging with puts while also betting on short-term breakouts with calls. This isn’t a logical contradiction—it’s a reflection of different time horizons: long-term defense coexists with short-term tactical plays.
Examining the Narrative’s Validity
Testing the "Pinning Equals Manipulation" Narrative
A common market belief is that the lack of price movement around major options expirations is the result of large players deliberately manipulating prices to favorable strikes. This narrative warrants careful scrutiny.
Market makers’ gamma hedging is a passive risk management activity, not active price manipulation. Their goal is to maintain delta neutrality, regardless of price direction, following set hedging algorithms. In a long gamma environment, hedging naturally leads to price mean-reversion; in a short gamma environment, it amplifies directional moves. In either case, market maker behavior is reactive, not directional.
The gamma pinning effect is an inherent feature of the options market structure—not the result of external manipulation. Historically, there’s no evidence of sustained manipulation pinning prices to specific strikes, because if such manipulation existed, arbitrageurs would exploit it for risk-free profits, causing the strategy to self-destruct.
Explaining the Pre-Expiry Volatility Drop
Some analyses attribute the pre-expiry volatility drop to risk-off sentiment or holiday-driven liquidity drains. However, with about a 73% probability, the data points to a systemic, not random, phenomenon. Options expirations create gamma concentrations, forcing market makers to execute large-scale hedging, which directly suppresses volatility.
Industry Impact Analysis
Implications for Trading Strategies
The gamma pinning effect impacts different market participants in different ways. For short-term traders, the gamma concentration zone acts as a "force field" for price action: breakout attempts between $75,000 and $80,000 are more likely to fail. For hedgers, the post-expiry gamma reset and volatility release signal a window to reassess risk exposure.
Implications for Market Structure and Maturity
The growing scale of the Bitcoin options market is reshaping BTC price discovery. Deribit’s total open interest has reached $31.3 billion, with positions clustered at key strikes. As a result, gamma pinning has evolved from an occasional occurrence to a cyclical pattern. Crypto derivatives are shifting from auxiliary tools to core drivers of price behavior.
At the same time, increased institutional participation has a dual effect—more mature capital provides liquidity and dampens day-to-day volatility, but when gamma exposure becomes extremely concentrated, derivatives hedging can actually amplify extreme market moves.
Conclusion
The phenomenon of BTC prices "stuck" around major options expirations isn’t a random product of market psychology. It’s the inevitable result of market maker gamma hedging when positions are highly concentrated. The $75,000 to $80,000 zone is essentially a structural constraint imposed by the derivatives market during price discovery.
Understanding this mechanism is valuable because it helps market participants distinguish between price moves driven by derivatives structure and those based on fundamentals. The former’s influence usually fades quickly after settlement, while the latter underpins longer-term trends. Until May 29, gamma pinning will continue to shape short-term price action; after expiry, how the suppressed volatility is released will be the key variable to watch.
