Trading positive vs negative gamma days

The most practical use of positioning is not picking a level — it is knowing which kind of day you are in. The same breakout setup that pays for a week straight in negative gamma bleeds to death in positive gamma, and traders who never separate the two conclude that their strategy “stopped working.” It did not. The regime changed underneath it.

Positive gamma: the market on a leash

With dealers long gamma, every push meets hedging in the opposite direction. Ranges tighten, moves retrace, and price gravitates to the strikes with the heaviest exposure — not by magic, but because hedging supply and demand is densest there.

What tends to work: fading extensions back toward heavy strikes, selling premium, and treating breakouts with suspicion until a wall actually gives way. What tends to hurt: chasing, and holding for continuation that the regime is built to deny.

Negative gamma: the leash comes off

With dealers short gamma, hedging chases price. Moves extend, pullbacks are shallow, and the flip level behaves less like a magnet and more like a trapdoor.

What tends to work: trading with the move, respecting momentum, and letting winners run further than feels natural. What tends to hurt: fading strength because it “looks extended.” In this regime, extended is the point.

The transition is the trade

The highest-information moments are crossings — price moving through the flip, or a wall failing after repeated tests. These are points where the mechanical flows that shaped the whole session reverse their lean.

A useful habit: when price approaches the flip from above, decide in advance what acceptance below it would look like — a close, a failed retest, a delta shift on the tape. Then you are reacting to a plan instead of a feeling.

A checklist that survives contact

• Before the open: net gamma sign, distance to the flip, the two nearest walls.
• At each wall touch: is the reaction dampening or accelerating? Let the tape confirm the map.
• On a flip cross: stop trading the old regime. The market you prepared for no longer exists.