Looking at options trading activity among components of the S&P 500 index, there is noteworthy activity today in Cisco Systems Inc (Symbol: CSCO), where a total volume of 79,747 contracts has been traded thus far today, a contract volume which is representative of approximately 8.0 million underlying shares (given that every 1 contract represents 100 underlying shares). That number works out to 46.1% of CSCO's average daily trading volume over the past month, of 17.3 million shares. Especially high volume was seen for the $60 strike call option expiring May 17, 2019, with 12,912 contracts trading so far today, representing approximately 1.3 million underlying shares of CSCO. Below is a chart showing CSCO's trailing twelve month trading history, with the $60 strike highlighted in orange:

HCA Healthcare Inc (Symbol: HCA) options are showing a volume of 6,010 contracts thus far today. That number of contracts represents approximately 601,000 underlying shares, working out to a sizeable 43.3% of HCA's average daily trading volume over the past month, of 1.4 million shares. Particularly high volume was seen for the $110 strike put option expiring April 18, 2019, with 821 contracts trading so far today, representing approximately 82,100 underlying shares of HCA. Below is a chart showing HCA's trailing twelve month trading history, with the $110 strike highlighted in orange:

And Cigna Corp (Symbol: CI) saw options trading volume of 10,280 contracts, representing approximately 1.0 million underlying shares or approximately 41.7% of CI's average daily trading volume over the past month, of 2.5 million shares. Particularly high volume was seen for the $175 strike call option expiring January 15, 2021, with 1,019 contracts trading so far today, representing approximately 101,900 underlying shares of CI. Below is a chart showing CI's trailing twelve month trading history, with the $175 strike highlighted in orange:

For the various different available expirations for CSCO options, HCA options, or CI options, visit StockOptionsChannel.com.
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