Among the S&P 500 index constituents, notable options trading activity occurred on October 16, 2023. Moderna Inc (MRNA) reported a total of 25,403 options contracts traded, equating to approximately 2.5 million underlying shares, which is around 48.1% of its average daily trading volume for the past month of 5.3 million shares. The highest volume was recorded for the $65 strike call option expiring on August 21, 2026, with 3,725 contracts, representing about 372,500 underlying shares.
UnitedHealth Group Inc (UNH) also demonstrated significant activity, with 24,052 contracts traded, amounting to roughly 2.4 million shares, or 46.1% of its average daily volume of 5.2 million shares. This included 3,756 contracts for the $410 strike call option expiring on October 16, 2026, translating to approximately 375,600 shares.
Eaton Corp plc (ETN) recorded 11,399 options contracts trading today, representing about 1.1 million shares, or 45.7% of its average daily volume of 2.5 million shares. Particularly high interest was shown in the $340 strike put option expiring on August 21, 2026, with 6,335 contracts, equating to approximately 633,500 underlying shares.
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