Notable Friday Option Activity: ALGN, KSU, IR

Among the underlying components of the S&P 500 index, we saw noteworthy options trading volume today in Align Technology Inc (ALGN), where a total of 4,681 contracts have traded so far, representing approximately 468,100 underlying shares. That amounts to about 60% of ALGN's average daily trading volume over the past month of 780,775 shares..