Imperva Falls to Earth as Cybersecurity Growth Comes at a Price

It’s been a wild ride for Anthony Bettencourt, the chief executive officer of Imperva Inc.

In the 17 months since he took charge, the database security company’s quarterly revenue grew 70 percent, it posted its first annual profit, and shares climbed to a record $77. The stock rally, already fading, suffered a sharp correction last week after Imperva gave a 2016 earnings forecast below analysts’ estimates. That helped drive a 23 percent drop to $39.62, the worst weekly selloff in almost two years.