Why does the gamma flip level matter for SPX?

It marks a regime boundary. When SPX trades above the gamma flip, sessions tend to be calm and range-bound with strong pinning. When SPX falls below it, dealer hedging flips to reinforcing the move, so ranges widen, selloffs accelerate, and rallies can become violent. The cross itself often triggers a burst of volatility as hedging behavior reverses.

Is the gamma flip the same as zero gamma?

Yes. Gamma flip, zero gamma, and gamma-neutral all refer to the same price — where net dealer gamma equals zero. The terms are used interchangeably; 'flip' emphasizes that dealer hedging behavior reverses as price crosses the level.

What Is the Gamma Flip Level?

Q: What is the gamma flip level?

The gamma flip level is the underlying price at which aggregate dealer gamma exposure crosses zero. Above it, dealers are net long gamma and hedge against moves, suppressing volatility. Below it, dealers are net short gamma and hedge with moves, amplifying volatility. It is also called the zero gamma or gamma-neutral level.

The single price where dealer hedging reverses — and the day's character changes with it

The gamma flip is the most important line on the chart that most traders have never heard of. It's the price where aggregate dealer gamma crosses zero — and where market-maker hedging switches from calming the market to accelerating it. Cross it, and SPX often starts behaving like a different instrument.

Defining the Flip

Recall that gamma exposure (GEX) measures how much dealers must re-hedge per point of movement. Sum it across every strike and you get net dealer gamma. The price where that sum equals zero is the gamma flip.

Same level, three names: gamma flip, zero gamma, and gamma-neutral all mean the same price. "Flip" just emphasizes the behavioral reversal that happens as price crosses it.

Why Crossing It Changes Everything

The flip is a boundary between two opposite hedging regimes — covered in depth in positive vs. negative gamma:

ABOVE the gamma flip → dealers LONG gamma hedge AGAINST moves (sell rallies / buy dips) → low volatility, tight ranges, strong pinning ───────────── GAMMA FLIP (net gamma = 0) ───────────── BELOW the gamma flip → dealers SHORT gamma hedge WITH moves (buy rallies / sell dips) → high volatility, trending, accelerating selloffs

This is why the flip behaves like a trapdoor. A market drifting calmly above it can turn violent the moment it breaks below — the same hedging that was absorbing every dip suddenly reverses and starts feeding the decline.

How to Trade Around the Gamma Flip

SPX well above the flip — favor mean-reversion: fade extremes, expect ranges to hold, pins to stick.
SPX approaching the flip from above — tighten up; the volatility cushion is thinning. A break below can trigger an air pocket.
SPX below the flip — respect trend and momentum; don't fade strength or catch knives. Ranges expand.
SPX reclaiming the flip — a move back above often restores calm as dealers flip back to long gamma.

The flip moves. It isn't a fixed price — it shifts every day (and intraday, especially with 0DTE flow) as open interest changes. Always read the current level, not yesterday's.

See today's gamma flip level

Zero Gamma plotted live alongside Call Wall and Put Wall

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Positive vs. Negative Gamma — the two regimes the flip separates

Gamma Exposure (GEX) Explained — how net gamma is calculated

Dealer Flow Explained — the hub: how hedging moves markets

Gamma Squeeze Explained — what negative gamma can unleash to the upside

What Is the Gamma Flip Level?

Defining the Flip

Why Crossing It Changes Everything

How to Trade Around the Gamma Flip

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