Could anyone tell me how the Fear and Greed Index is determined?

The Fear and Greed Index is an indicator that measures market sentiment, reflecting whether investors' current psychological state is in a state of "fear" or "greed". This index is calculated based on multiple market factors and is commonly used in high-risk investment areas such as stocks and cryptocurrencies, helping investors determine whether the market is overly fearful or overly optimistic, thus assisting in investment decisions.

Main components
The Fear and Greed Index is usually calculated based on a composite of data from multiple dimensions (the specific algorithms may vary slightly among different institutions):
1. Market Volatility: Such as the VIX Fear Index, the greater the volatility, the stronger the fear sentiment.
2. Market Trading Volume (Volume): Abnormally increased or decreased trading volume may reflect extreme sentiment.
3. Stock Price Momentum: A rapid increase in price may indicate greed, while a sharp decline reflects fear.
4. Demand for safe-haven assets: price changes of safe-haven assets such as gold and government bonds.
5. Options market sentiment: Put/Call Ratio.
6. Retail Investor Sentiment Survey: Proportion of optimistic/pessimistic investors.
7. Technical Indicators: Such as the degree to which the stock price deviates from the moving average (overbought/oversold).

Index Segmentation
Typically represented as 0-100 points:
0-25 points: Extreme Fear (possibly oversold, buying opportunity).
26-45 points: Fear (cautious emotion).
46-55 points: Neutral (Balanced Market).
56-75 points: Greed (Optimistic sentiment).
76-100 points: Extremely greedy (possibly overbought, beware of a pullback).

Application Scenarios
1. Contrarian Investing: When the index shows "Extreme Fear," it may be an opportunity to buy the dip; conversely, when it shows "Extreme Greed," one should be wary of risks.
2. Market Trend Validation: Combine fundamental analysis to determine whether the sentiment diverges from the market trend.
3. Cryptocurrency Market: Cryptographic assets such as Bitcoin are widely monitored for their high volatility, with the Fear & Greed Index being a notable focus (such as CNN's Cryptocurrency Fear & Greed Index).

Precautions
The Fear and Greed Index is a short-term sentiment indicator that needs to be used in conjunction with long-term fundamentals.
Extreme emotions may last for a long time, and one should avoid blindly "bottom fishing" or "top escaping."