What Would Change My Mind

• If SPY sustains a close above $775 through monthly OPEX expiration tomorrow with volatility compression below 12 VIX, dealer short-gamma accumulation reverses and convexity flips positive across the broad index, invalidating the negative-gamma thesis entirely. • If NVDA breaks above its $220 flip level and holds it through post-OPEX settlement while QQQ remains above $719, the tech concentration driving negative convexity deteriorates as single-name gamma hedging dynamics decouple from index-level dealer flows. • If volatility spikes into OPEX with realized moves exceeding 2.5% intraday on SPY while put skew inverts sharply, bank dealers' short-gamma positions force mechanical buying into strength rather than selling into weakness, structurally inverting the downside acceleration mechanism embedded in the current regime.