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Fear & Greed Index

Sep 4, 2025 | Updated Sep 4, 2025
The Fear & Greed Index is a tool that measures crypto market sentiment, gauging whether investors are feeling fearful or greedy.

What Is the Fear & Greed Index?

The Crypto Fear & Greed Index is a market sentiment indicator that gauges the collective emotional state of cryptocurrency investors. It compiles various data points into a single number, ranging from 0 (Extreme Fear) to 100 (Extreme Greed). The core idea is based on the theory that excessive fear can drive prices down to oversold levels, presenting a potential buying opportunity, while extreme greed can lead to overvalued markets, signaling a potential correction.

This index acts as a thermometer for market psychology. It doesn’t predict future prices but rather provides a snapshot of the current mood. The concept is based on the philosophy of famous investor Warren Buffett, who said it’s wise to be “fearful when others are greedy, and greedy when others are fearful.”

The original Fear & Greed index was created by CNNMoney for the stock market; crypto versions simply adapt the same principles for digital assets.

How Does the Fear & Greed Index Work?

The Fear & Greed Index is calculated by analyzing a blend of different market factors, each weighted to contribute to the final score. While the exact formula can vary between different versions of the index, key components generally taken into account include:

  • Volatility
    • Measures current price volatility against recent price averages. High volatility is often a sign of a fearful market.
  • Market Momentum/Volume
    • Compares the current trading volume and momentum to historical averages. Unusually high buying volume is a sign of a greedy market.
  • Social Media
    • Analyzes the volume and sentiment of crypto-related posts and hashtags on platforms like X (formerly Twitter) to gauge public interest and excitement.
  • Dominance
    • Looks at Bitcoin’s share of the total crypto market cap. A rising Bitcoin dominance often indicates fear, as investors sell riskier altcoins for the relative safety of Bitcoin.
  • Trends
    • Analyzing internet search trend data for crypto-related terms to measure retail interest and potential FOMO (Fear Of Missing Out).

Traders use the index to get a sense of whether the market’s reaction is emotional or rational. A score of “Extreme Fear” might suggest that investors are panicking, potentially creating an attractive entry point for long-term investors. Conversely, a score of “Extreme Greed” could indicate that the market is due for a pullback. However, it’s crucial to view the index as just one tool among many and not as a standalone trading signal.

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