Zscaler jumps 10% after Guggenheim upgrade signals 40% upside

Shares of Zscaler surged on Monday after Guggenheim upgraded the cybersecurity company to Buy from Neutral, arguing that the recent selloff has created an attractive entry point for investors despite ongoing concerns about growth. Zscaler shares climbed 10% to $154.11, extending a rebound that put the stock on track for its third consecutive daily gain.