Among the components of the S&P 500 index on August 21, 2026, SanDisk Corp (SNDK) reported significant options trading volume, with 134,974 contracts traded, equating to roughly 13.5 million underlying shares—approximately 76.7% of its average daily volume of 17.6 million shares over the past month. The $1600 strike call option was particularly active, with 11,070 contracts traded.
Amgen Inc (AMGN) experienced an options trading volume of 19,160 contracts, representing around 1.9 million shares, or 68.6% of its monthly average of 2.8 million shares. The notable transaction involved 3,505 contracts of the $0 strike put option, which corresponds to about 350,500 underlying shares.
Federal Realty Investment Trust (FRT) saw trading of 5,779 contracts, or approximately 577,900 shares, which is 63.6% of its monthly average volume of 908,145 shares. A significant part of the volume came from 5,745 contracts of the $120 strike call option.
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