Notable Monday Option Activity: PANW, ENPH, GM

Among the underlying components of the S&P 500 index, we saw noteworthy options trading volume today in Palo Alto Networks, Inc (PANW), where a total of 19,084 contracts have traded so far, representing approximately 1.9 million underlying shares. That amounts to about 52.2% of PANW's average daily trading volume over the past month of 3.7 million shares..