Triple or Quadruple Witch?

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 futures trading in the US has ceased to truly be part of the financial market landscape, and traders went back to referring to these events by their original nickname... the "triple witching" of expirations.