Cybersecurity is a critical need for every organization, so the recent stock market weakness might be a great opportunity to buy Zscaler stock.The S&P 500 generated a return of 15% in the first half of this year, but it recently hit a patch of volatility and is trading 3% below its July peak. The next couple of months could be tricky to navigate with the Federal Reserve set to cut interest rates, and the U.S. presidential election in November.But history suggests the S&P 500 always recovers to new highs ove ...