Why Zscaler Stock Tanked 13% Today

High-growth but richly valued tech stocks have been getting hammered by the market as of late, and software cybersecurity disruptor Zscaler (NASDAQ: ZS) hasn't been exempt. As for the specific plunge today (Zscaler is up 36% in 2021 with just weeks to go until the new year), analyst Stephen Bersey at Daiwa Capital downgraded Zscaler to underperform and stuck a $286 price target on the stock. A slew of other Wall Street prognosticators waxed optimistic on Zscaler last week after the company said revenue grew 62% year over year in the last quarter, and deferred revenue (sales collected from customers, but for which service has not yet been provided) boomed 74% higher.