SPY opened the June 2 session pressing into a dense call wall at 600, with dealer gamma flipping positive above 598 — the structural setup for a gamma squeeze into Friday expiry. This note breaks down the levels, the flow that built them, and the play.

598.40
Spot
598.00
Gamma Flip
600.00
Call Wall
594.00
Put Support

Why dealer gamma matters above 598

When dealers are long gamma, they hedge by selling rallies and buying dips — dampening volatility and pinning price toward the largest strike. Above the 598 flip, every tick higher forces incremental call-delta hedging that adds to the move instead of fading it. That is the squeeze mechanic.

ℹ️ INFO
Gamma flip is the spot level where aggregate dealer gamma crosses from negative to positive. Below it, hedging amplifies moves; above it, hedging suppresses them — until a call wall breaks.

The levels into Friday

SPY — 30m, June 2 session

A clean break and hold above 600 uncorks the wall — the next meaningful resistance sits near 604. Lose 598 and the squeeze thesis is dead; gamma flips negative and 594 comes into play fast.

💡 TIP
Trade the level, not the narrative. Long only confirms above 598 on a 30-minute close. Below it, stand aside — negative gamma days chop.

The play

Long SPY calls or shares above a 30-minute close over 598, targeting the 600 wall break toward 604. Stop below 597. Risk is defined: if dealers defend 600 and gamma pins, the squeeze stalls and you take the small loss.

⚠️ WARNING
This is a same-week expiry setup. Theta is brutal — size for a 1–2 day hold, not a swing. If 600 does not break by Thursday close, exit.

Positive dealer gamma above 598 plus a stacked 600 call wall is a textbook squeeze frame. The edge is mechanical, the invalidation is clean, and the hold is short. Watch the 598 close — everything keys off it.