After Fortinet reported weaker than expected Q2 results, JMP Securities analyst Erik Suppiger estimates that the company's organic billings growth dropped to 15% last quarter from 25% in Q1, due to slower sales in the Americas.However, Suppiger remains upbeat on the comapny's longer term outlook, saying that it can penetrate many larger accounts and benefit later this year from its prior investments in sales and marketing. The analyst expects the company's ooperating margins to expand in 2H16, and he thinks that the company can benefit from the increased use of firewalls to segment internal traffic. Suppiger recommends buying the stock at current levels.