Vix Index
In short
The VIX Index measures how much the stock market expects prices to swing over the next 30 days. It uses S&P 500 index options to gauge investor uncertainty.
In plain words
It is a tool that shows how nervous investors are about the market. When people expect big price changes, the VIX goes up. When the market feels calm, the VIX goes down.
A simple example
If a major political event is coming up, investors might buy more options to protect themselves. This increased activity usually causes the VIX to rise sharply.
Why it matters
It acts as a thermometer for market fear. Traders use it to decide if it is a good time to buy stocks or if they should seek safety.
Easy to mix up
Do not confuse it with the actual price of the S&P 500 index itself.