Bitcoin Successfully Navigates Major Options Expiry: Understanding the Gamma Reset

Bitcoin has successfully weathered one of the largest options settlement events of the year, demonstrating resilience amidst significant market activity. Despite fears of a major sell-off, the cryptocurrency maintained its value, signaling a deeper, more nuanced shift in market dynamics.

On September 25th at 08:00 UTC, approximately $16 billion worth of Bitcoin options on Deribit expired. This monumental event accounted for roughly 37% of the platform’s total BTC options open interest at the time. Contrary to the anxieties expressed by some traders, the market did not experience a sharp decline. Bitcoin’s price remained stable, trading between approximately $84,100 and $84,300 throughout the Asian evening session.

The true significance of this event isn’t merely the expiry of $16 billion in contracts. Instead, it marks the market’s entry into a new phase of “Gamma positioning reconstruction,” following the dissolution of these substantial quarterly contracts.

Data provided by Deribit CEO Luuk Strijers revealed that of the approximately $15.9 billion in BTC options that expired, calls constituted about $9.4 billion, while puts totaled roughly $6.5 billion. With a Put/Call Open Interest ratio of approximately 0.69, the overall market sentiment remained predominantly skewed towards call options.

While a prevailing market rumor suggested that the $16 billion options expiry could trigger immense volatility, it’s crucial to understand that this figure represents the nominal value of the contracts. It does not imply that $16 billion in spot BTC would be simultaneously bought or sold.

A substantial portion of out-of-the-money (OTM) options ultimately expire worthless. In-the-money (ITM) contracts are settled according to established mechanisms. Therefore, interpreting the nominal expiry volume directly as spot selling pressure is a common misconception. Deribit’s rules stipulate that quarterly BTC options expire on the last Friday of the quarter at 08:00 UTC, with the final settlement price determined by the Time-Weighted Average Price (TWAP) of the Deribit Index during the 30 minutes leading up to expiry.

BTC Holds Strong at $84,000, Defying “Max Pain” at $75,000

Another focal point leading up to the expiry was the “Max Pain” point for this round of BTC options, estimated to be around $75,000.

However, Bitcoin consistently traded in the $83,000-$85,000 range before the expiry and showed no rapid decline towards $75,000 afterward. As of the evening of September 25th (Taipei time), CoinMarketCap reported a real-time price of approximately $84,100.

This outcome once again underscores that Max Pain is not a predictive price target. Max Pain is merely a theoretical price point, calculated based on open options positions, where the overall intrinsic value for options buyers is minimized. When the spot price is significantly distant from this theoretical point, there is no inherent mechanism compelling the price to converge towards Max Pain before expiry.

The Crucial Shift: Disappearance of Positive Gamma Near $85,000

Beyond Max Pain, the concept of “Gamma” offers a more profound explanation for why BTC remained tightly bound between $84,000 and $85,000 for an extended period before the expiry.

Market data from September 24th indicated that BTC was largely in a “Positive Gamma” state, with a net Gamma Exposure of approximately +$395 million. The most significant concentration of positive Gamma was observed around the $85,000 mark, while the “Gamma Flip” point was situated near $75,931.

In a Positive Gamma environment, market makers typically adjust their hedges to maintain Delta neutrality. This often involves selling to hedge when prices rise and buying to hedge when prices fall. This dynamic trading mechanism tends to suppress short-term price volatility. Consequently, Bitcoin’s narrow trading range leading up to the large expiry doesn’t necessarily imply a reduction in inherent market risk; rather, it can be partly attributed to the hedging activities of market makers.

$16 Billion Contracts Vanish, Ushering in a “Gamma Reset”

The most significant structural change now is the simultaneous expiry of quarterly contracts, which represented a substantial 37% of Deribit’s BTC options Open Interest (OI). With the expiry of these contracts, the associated Delta, Gamma, and market maker hedging requirements either vanished or were rolled over into October and December contracts.

Therefore, the “Gamma Reset” does not inherently signal an inevitable price increase for BTC. Instead, it signifies that a large cohort of options positions that previously constrained price volatility has been cleared from the market. The market must now rebuild its new Call, Put, and Gamma distributions. An analysis by the Economic Times concerning this expiry similarly noted that after a quarterly expiry, a large volume of positions disappears or is rolled over, which can alter the market’s responsiveness to subsequent spot buying and selling.

Prior to the expiry, a significant concentration of Call OI was observed around $85,000, $90,000, $95,000, and $100,000, with the $90,000-$100,000 range serving as a crucial overhead resistance zone.

Consequently, the market’s focus should now shift away from the September Max Pain, which has lost its relevance, and instead concentrate on where new October and December options positions will be re-established.

If new positive Gamma once again converges around the $85,000 level, Bitcoin may continue its range-bound trading. Conversely, if Gamma suppression markedly decreases while spot demand simultaneously rises, volatility could re-amplify. Should new positions gradually lean towards puts, indicating an increase in defensive hedging, the Gamma reset could similarly magnify downward volatility.

The fact that BTC did not crash after the $16 billion expiry merely confirms that a large settlement event, by itself, does not generate direct selling pressure. It does not independently confirm the market’s next direction. The true signals for the next phase will emerge from the newly established options Open Interest, the redistributed Gamma profile, and the market’s ability to sustain BTC above the $85,000 level with spot funding.