Earnings reports are critical events for companies and can significantly influence stock prices. A decline in Zscaler's share price following their Q1 financial results suggests that the market may have reacted negatively to the earnings release. This could be due to earnings not meeting market expectations, or possibly guidance that was below analyst forecasts. Without specific details on the financial results, it's difficult to pinpoint the exact cause, but the correlation between the earnings release and the stock price drop is clear.