Looking at options trading activity among components of the Russell 3000 index, there is noteworthy activity today in T-Mobile US Inc (NASD: TMUS), where a total volume of 82,589 contracts has been traded thus far today, a contract volume which is representative of approximately 8.3 million underlying shares (given that every 1 contract represents 100 underlying shares). That number works out to 159.7% of TMUS's average daily trading volume over the past month, of 5.2 million shares. Particularly high volume was seen for the $50 strike call option expiring January 20, 2017, with 40,141 contracts trading so far today, representing approximately 4.0 million underlying shares of TMUS. Below is a chart showing TMUS's trailing twelve month trading history, with the $50 strike highlighted in orange:
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