The CNN Fear and Greed Index closed at 37 on June 18. That puts equities in Fear territory, down from 70 just two months ago. The crypto version hit 8 in early June. Both moved on the same catalyst: a hawkish FOMC dot plot that nobody expected to shift as hard as it did.
If you already know what the index is, you probably still misuse it. Most traders treat a low reading as an automatic buy signal and a high reading as an automatic sell. That is not how it works. Here is what the index is actually measuring, where the two versions differ, and how to use them without getting burned.
What Is the Fear and Greed Index?
The Fear and Greed Index is a composite sentiment indicator that measures the emotional state of financial markets on a scale from 0 to 100. Zero means extreme fear. One hundred means extreme greed. Fifty is neutral.
CNNMoney created the original version in spring 2012. The idea came from a straightforward observation: investors are not rational. Prices move on emotion as much as fundamentals, and those emotions cluster into two states, fear and panic-selling, or greed and FOMO-buying. The index tries to quantify which state dominates at any moment.
There are now two distinct versions: the CNN version for equities and several crypto-specific versions. They share the same scale and philosophy but are built from different data entirely.
How Does the CNN Equities Fear and Greed Index Work?
The CNN index tracks seven components, each measuring a different aspect of investor behavior in traditional markets.
Market momentum compares the S&P 500's current level against its 125-day moving average. When the index trades above that average, it scores toward Greed. Below it, toward Fear.
Stock price strength counts how many NYSE stocks are hitting 52-week highs versus 52-week lows. A wide spread toward highs is a Greed signal.
Stock price breadth looks at the volume of rising shares versus falling shares via the McClellan Summation Index. Breadth measures participation. A market where 10 stocks drive the gains while 490 go nowhere reads differently than one where 400 stocks are up.
Put and call options tracks the ratio of puts to calls. A rising put/call ratio means traders are buying downside protection, which registers as Fear.
Market volatility uses the VIX. Higher VIX scores toward Fear. The VIX was at 22.22 after the May CPI print and spiked again post-FOMC.
Junk bond demand watches the yield spread between high-yield bonds and safer government debt. When traders accept lower premiums for credit risk, that is Greed. Widening spreads indicate Fear.
Safe haven demand compares stock versus Treasury bond returns over the past 20 trading days. When bonds outperform stocks, investors are seeking shelter.
Each component is scored individually and averaged into the composite reading. Equal weighting means no single component dominates.
How Does the Crypto Fear and Greed Index Work?
The crypto version uses entirely different inputs because it is a different market. Social media activity, Bitcoin dominance, trading volume, and derivatives positioning replace the equity-specific components.
The Alternative.me index weights volatility and momentum most heavily. It measures Bitcoin price swings over 30 and 90 days and tracks volume changes. Social media gets 15% of the weight, monitoring crypto-related activity on X.
CoinMarketCap's version analyzes the top 10 cryptocurrencies by market cap, excluding stablecoins. It uses Volmex Implied Volatility Indices for Bitcoin and Ethereum, the put/call ratio in crypto options markets, and the Stablecoin Supply Ratio. High stablecoin ratios suggest traders sitting on the sidelines, which reads as Fear.
The OpticAlpha terminal tracks both versions live alongside liquidation data and CVD, giving a multi-signal view of whether sentiment matches actual positioning.
What Do the Scores Actually Mean?
Both versions use the same zones: 0 to 24 is Extreme Fear, 25 to 44 is Fear, 45 to 55 is Neutral, 56 to 75 is Greed, and 76 to 100 is Extreme Greed.
The extremes are where the index becomes useful. When the crypto gauge hit 8 in early June, it was the kind of reading that historically precedes recoveries. When it read 88 in December 2024, Bitcoin was at $109,000 and approaching a local top. The CNN equities version sat at 84 the day before Bitcoin hit its 2021 all-time high of $69,044. One year later on the same date, it read 29 and Bitcoin had crashed to $15,922.
Those historical patterns are real. But they are not a trading system.
Is the Fear and Greed Index a Reliable Buy Signal?
Following an extreme fear reading in equities, S&P 500 returns over the next three months have averaged 8.6% since 2019. That is a meaningful edge, not a guarantee, and the range of outcomes around that average is wide.
The index works as a contrarian indicator. When extreme fear dominates, the selling pressure has often already peaked. When extreme greed takes over, the buying pressure is frequently exhausted. The practical use is as a filter. Most experienced traders do not open new positions in extreme greed, not because the market cannot keep rising, but because the risk/reward shifts. You are buying after a crowd that already bought.
Extreme fear does not mean buy immediately. It means emotional selling may be close to exhaustion, and the next positive catalyst can trigger a sharp reversal.
Where Do Most Traders Go Wrong?
The common mistake is treating a number like 20 or 80 as a precise entry or exit trigger. A reading of 37 versus 42 does not matter. What matters is whether you are in a zone that historically represents emotional exhaustion versus emotional exuberance.
The second mistake is using the index in isolation. It says nothing about why sentiment shifted. The recent drop from 70 to 37 in equities came from Warsh's dot plot, which changed the rate path narrative overnight. The index captured the result but not the mechanism. You need to understand the driver to know whether the fear is rational or overdone.
The third mistake is confusing the equities version with the crypto version. They often diverge sharply. In June 2026, equities sat at 37 while crypto briefly hit 8. The two markets were processing different catalysts entirely. Treating them as the same signal leads to wrong positioning in one of them.
How Does the Fear and Greed Index Work With Other Indicators?
The OpticAlpha terminal displays both the CNN equities gauge and the crypto version live, updated in real time, alongside the liquidation heatmap and options flow data.
When the crypto Fear and Greed sits at extreme fear while the liquidation heatmap shows clusters of long liquidations overhead, that is a more complete picture than either signal gives alone. The index tells you the crowd is scared. The liquidation data tells you where the pain is concentrated. The options flow tells you what institutional players are actually doing versus what retail sentiment suggests.
Sentiment indicators confirm positioning. They do not replace it.
PCE prints Thursday June 25. Wells Fargo is forecasting 4.1% year over year, up from April's 3.8%. A hot print will move both gauges. Watch where they land before and after the release.
Track live sentiment, liquidations, and options flow at opticalpha.net/terminal. 14-day free trial, no credit card required.