Shares of (NASDAQ: FTNT), a cybersecurity company, tumbled today after the company reported its third-quarter results. Fortinet beat Wall Street's consensus revenue and earnings estimates for the quarter, but investors latched onto the company's fourth-quarter sales guidance, which was lower than expected.

As a result, Fortinet stock was down by 6.3% as of 1:56 p.m. ET.

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Source Fool.com