Network and cybersecurity companies had a rough go of it on Thursday as disappointing earnings reports and outlooks from the likes of Fortinet (NASDAQ:FTNT) and Rapid7 (NASDAQ:RPD) dragged down investor sentiment on the sector across Wall Street.

Fortinet (FTNT) fell by almost 14% as it gave a fourth-quarter billings forecast of between $1.66B and $1.72B, which fell short of estimates of $1.74B. The company also said it expects revenue for the quarter to be between $1.275B and $1.315B, and gave a third-quarter report that surpassed Wall Street analysts' forecasts.