Looking at options trading activity among components of the S&P 500 index, there is noteworthy activity today in Clorox Co (NYSE: CLX), where a total volume of 4,137 contracts has been traded thus far today, a contract volume which is representative of approximately 413,700 underlying shares (given that every 1 contract represents 100 underlying shares). That number works out to 57.7% of CLX's average daily trading volume over the past month, of 716,480 shares. Especially high volume was seen for the $125 strike put option expiring September 16, 2016, with 2,263 contracts trading so far today, representing approximately 226,300 underlying shares of CLX. Below is a chart showing CLX's trailing twelve month trading history, with the $125 strike highlighted in orange:
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