Looking at options trading activity among components of the S&P 500 index, there is noteworthy activity today in Priceline Group Inc. (NASD: PCLN), where a total volume of 9,860 contracts has been traded thus far today, a contract volume which is representative of approximately 986,000 underlying shares (given that every 1 contract represents 100 underlying shares). That number works out to 216.9% of PCLN's average daily trading volume over the past month, of 454,585 shares. Especially high volume was seen for the $1520 strike call option expiring January 20, 2017, with 410 contracts trading so far today, representing approximately 41,000 underlying shares of PCLN. Below is a chart showing PCLN's trailing twelve month trading history, with the $1520 strike highlighted in orange:
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