Looking at options trading activity among components of the S&P 500 index, there is noteworthy activity today in State Street Corp. (Symbol: STT), where a total volume of 5,487 contracts has been traded thus far today, a contract volume which is representative of approximately 548,700 underlying shares (given that every 1 contract represents 100 underlying shares). That number works out to 41.5% of STT's average daily trading volume over the past month, of 1.3 million shares. Especially high volume was seen for the $190 strike put option expiring September 18, 2026 , with 3,307 contracts trading so far today, representing approximately 330,700 underlying shares of STT.
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