August Opex Squeeze: Gamma Flips and the Reversal at the 20-Day

The Friday session opened with a definitive 'flush' mentality as the SPY breached the psychological 550 level on heavy volume. Sellers initially dominated the tape, driven by a hawkish lean in the overnight yields and lingering jitters from the previous session's tech weakness. However, the tape pivoted sharply at 10:30 AM EST as the index tagged its 20-day moving average, triggering a massive wave of program buying that caught the early shorts leaning the wrong way.

Semiconductors led the charge back into the green, with NVDA reclaiming its morning losses to finish near session highs. The price action was characterized by a classic 'V-bottom' recovery, fueled by monthly options expiration dynamics. As the gamma flip level was breached to the upside, market makers were forced to hedge, creating a feedback loop of buying that ignored the broader macro headlines. Small caps underperformed early but eventually caught a bid as the IWM reclaimed its intraday VWAP, signaling a broad-based appetite for risk into the close.

Volume profile analysis shows a significant cluster of trades at the 554.50 pivot, which now serves as the line in the sand for Monday's open. The late-day ramp was relentless, leaving little room for pullbacks, a move typical of Opex pinning. Traders should watch for a potential 'gap and crap' scenario next week if today's momentum isn't validated by fresh capital inflows, but for now, the bulls have successfully defended the trend.

Today's edge: Today's edge: Front-run the institutional squeeze by tracking StocksLeak for the unusual order flow that signals a bottom before the retail volume arrives.