Unusual Put Activity:
Pure Storage Inc. $PSTG, up $0.32 to $37.14 at time of posting, has a ~12:1 over calls being driven by activity on the October 20th 35.00 put.
Volume on this contract is 3,756 versus open interest of 101, so we know that the activity primarily represents fresh positioning.
The bulk of the transactions on this contract consisted of various-sized blocks that were being bought around the same time at the ask price of $1.70 each, which suggests bearish intent.