Shares of Juniper Networks have struggled over the past year, down more than 15%. The sell-off isn't stopping Jon Najarian. After spotting very fast short-term options in the tech name, he got in. Najarian notes: "Based on the activity, traders seem to be betting on a quick spike in the direction of the bet. In this case, call buying, we look for quick upside move before this Friday." Jon bought calls in his personal portfolio and added the stock to his Halftime Portfolio.