The market spent most of last week locked in the SPX 6,800–6,900 range that has largely held since Thanksgiving. Wednesday’s VIX expiration and Friday’s monthly OPEX defined the week’s rhythm, while negative gamma positioning and elevated single-stock put demand maintained pressure under the surface. Our historical OPEX data suggests the market is positioned for a […]
dealer gamma
Gamma Before China Trade Talks
We started the day negative gamma but had a rally to just above the zero gamma level. There appears to be a sizeable market hedge at 2900 which could provide support for the markets. If volatility breaks the put hedges that dealers are holding will act as fuel to spark a strong rally. The 3000 […]
October’s Negative Gamma
Here is a brief summary of the October Negative Gamma move so far. On 9/30 around the 3000 level in SPX we calculated a long gamma position for the market, but that quickly changed due to a very ugly ISM print. Once the market punched through the 2970 volatility trigger level, dealers fueled the selloff […]
Short Gamma vs Long Gamma
As dealers were short gamma for most of August they have moved to long gamma. Below is a chart comparing their theoretical behavior in each gamma regime. You can see when dealers are short gamma and the market is falling they are trading with the market, fueling the drop. Conversely when long gamma they are […]