Fortinet has drawn upside option activity several times in recent months, and the bulls came back for more yesterday.
More than 3,100 December 22 calls were bought for $1.25 to $1.40, according to OptionMonster's real-time tracking systems. Open interest in the strike showed just 256 contracts before the session began, so yesterday's action was fresh buying.
These calls lock in the price where traders can buy the stock no matter how far it might rise through mid-December. The options could be sold earlier at a profit if premiums gain with a rally before then, but the contracts could expire worthless if shares remain below $22.