BTC rose 0.83% in 15 minutes: 82K options expiry gamma hedging triggers a short-term spike

From 15:00 to 15:15 UTC on May 29, 2026, BTC achieved a +0.83% return. The price range was 72,996.9 - 73,756.2 USDT, with an amplitude of 1.04%. The short-term market showed technical rebound characteristics, and volatility has increased compared with before.

The main driver behind this move is the concentrated release of the options expiry Gamma hedging mechanism. On May 29, Bitcoin options with around $6 billion in notional value expired on platforms such as Deribit and CME. Open interest is highly concentrated at the $82,000 strike price, creating an “options magnet” effect. Market makers that sell these call options need to buy Bitcoin to hedge their short Delta exposure. During the 15:00-15:15 UTC window when options are concentratedly settled, the Gamma hedging buying pressure is released in a concentrated manner, pushing the price upward in the short term.

In addition, a technical oversold rebound provides secondary support. Since May, Bitcoin has continued to fall; the RSI has entered the oversold area. On-Balance Volume confirmed a “roller-coaster top” reversal pattern, and price is at a relatively low level that attracts technical dip-buying. Meanwhile, $82,000 as the options strike “psychological line” resonates with the TBO Fast line identified in earlier technical analysis. It is worth noting that ongoing ETF outflows pose medium-term pressure—net outflows of $2.3 billion in May, the largest monthly outflow in 2026. Institutional deleveraging has been faster than the weakness suggested by price alone, creating a near-term tug-of-war between bullish and bearish factors.

The market still faces multiple risks. Technically, the daily chart is in a strong bearish pattern. The next key support level is $71,402, leaving about 4% downside from the current price. After the options expiry, market makers’ hedging de-risking will reduce directional pressure, and volatility may drop quickly. If the ETF outflow trend continues, it will keep exerting price pressure. Investors should closely monitor whether the $71,402 support holds or breaks, changes in ETF fund flows, and how geopolitical events impact macro risk-hedging sentiment.