Among the underlying components of the S&P 500 index, we saw noteworthy options trading volume today in American Express Co. (NYSE: AXP), where a total of 21,631 contracts have traded so far, representing approximately 2.2 million underlying shares. That amounts to about 43.3% of AXP's average daily trading volume over the past month of 5.0 million shares. Particularly high volume was seen for the $57.50 strike put option expiring July 08, 2016, with 1,705 contracts trading so far today, representing approximately 170,500 underlying shares of AXP. Below is a chart showing AXP's trailing twelve month trading history, with the $57.50 strike highlighted in orange:
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