SPY Weekly Options Positioning Map: 685 Pivot, 660 Floor, 700 Ceiling
SPY flipped to positive gamma for the first time in weeks at 681, with the gamma wall at 685. Dealers are now dampening moves. The 660 floor and 700 ceiling define the range heading into April 17 OPEX (31% of OI). IV backwardation and elevated put skew say hedging demand hasn't unwound.