The S&P 500 should get a dealer bid once the Fed meeting passes, as rich event premium vanishes and dealers buy back hedges they no longer need. Options price 19% volatility for Friday versus 14% ten days out, and the board carries -$26.2B pointed at that unwind. Friday's -$6.6B of negative gamma means the $750 floor may not hold first: the move comes first, the bid after. x.com