Today will almost certainly bring increased volatility in price discovery on heavy trade as a rough $5.5T worth of options tied to single stock / ETFs, equity indices, and equity index futures all expire. This could cause some short-term price dislocation. The event for several years, was referred to as "quadruple witching" expirations back when single stock futures were more of a thing in the US. Since the OneChicago exchange closed in September of 2020, single stock ...