Zscaler 's stock plummeted more than 30% on Wednesday for its worst day ever after issuing underwhelming guidance that overshadowed better-than-expected fiscal third-quarter results. The cybersecurity company guided for 16% to 17% year-over-year annual recurring revenue growth for the 2027 fiscal year, falling short of StreetAccount estimates. Zscaler expects $875 million to $878 million in revenue this quarter, coming up slightly short of the $878.6 million expected by FactSet. Zscaler