The VIX Index, officially known as the Chicago Board Options Exchange Volatility Index, is calculated using the prices of near-term and next-month options with expiration dates ranging from 23 to 37 days. It measures the expected 30-day annualized volatility of the S&P 500 Index.Simply put, the VIX measures the implied volatility of the S&P 500 Index. A higher VIX value indicates greater expected market volatility. Given the importance of the S&P 500 Index, the VIX is often referred to as the "fear gauge" of the market, signaling potential risks.The "Rule of 16" for VolatilityInvestors can trade VIX futures and options directly. Despite its popularity, many investors do not fully understand how the VIX measures option volatility, its implications, and how to estimate its most a