Blogs
Fear & Greed Index: What It Measures and How Traders Use It
Aman Anand
Short answer: The CNN Fear & Greed Index is a sentiment gauge for the US stock market that combines seven market indicators into one score from 0 to 100, where 0 signals maximum fear and 100 maximum greed. Traders mostly use it as a contrarian signal or a sentiment filter. It is a summary of other indicators, not a proven trading edge on its own, so any rule built on it should be backtested first.
Last updated October 2026. The methodology below is taken from CNN's Fear & Greed Index page, as of October 2026. CNN can change its method at any time. This guide does not report a current reading. This guide is educational and is not financial advice.
What is the Fear & Greed Index?
The Fear & Greed Index is published by CNN Business. It tries to answer a simple question: are investors acting scared or greedy right now? The idea behind it is that emotion pushes prices too far in both directions. Heavy fear can push stocks below what they are worth, and heavy greed can push them above it.
CNN describes the index as a compilation of seven indicators that each measure some aspect of stock market behavior. It tracks how far each indicator has moved from its average compared with how far it normally moves, then gives each indicator equal weight in a single score.
What do the numbers mean? The 0 to 100 scale
The index runs from 0 to 100. CNN labels each reading with one of five zones. Based on the ratings in CNN's own published index data, the bands work out as follows:
Score | Label | What it suggests |
|---|---|---|
0 to 25 | Extreme Fear | Broad selling, high volatility, demand for safety |
25 to 45 | Fear | Caution outweighs risk appetite |
45 to 55 | Neutral | No strong lean either way |
55 to 75 | Greed | Risk appetite outweighs caution |
75 to 100 | Extreme Greed | Strong momentum, low volatility, appetite for risky assets |
The page also shows the score from the previous close, one week ago, one month ago and one year ago, which helps you see whether sentiment is shifting or stuck.
What are the seven indicators?
According to CNN, the index uses these seven components, each scored on the same fear to greed scale:
Market momentum: the S&P 500 compared with its 125-day moving average. Trading above the average is read as greed, below it as fear.
Stock price strength: the number of NYSE stocks hitting 52-week highs versus 52-week lows. Many more highs than lows signals greed.
Stock price breadth: the McClellan Volume Summation Index, which compares the volume of NYSE shares rising with the volume falling. Low or negative readings point to fear.
Put and call options: the 5-day average put/call ratio. A rising ratio means more demand for downside protection. CNN notes a ratio above 1 is considered bearish.
Junk bond demand: the yield spread between junk bonds and investment grade bonds. A narrow spread means investors are reaching for risk (greed). A wide spread shows caution.
Market volatility: the Cboe Volatility Index (VIX) compared with its 50-day moving average. Rising volatility is read as fear.
Safe haven demand: the difference between stock and Treasury bond returns over the past 20 trading days. Bonds outperforming stocks signals fear.
Notice what the list shares: most of these are price, volatility or positioning data, not surveys of how people feel. The index infers mood from market behavior.
How often does the Fear & Greed Index update?
CNN says every component and the index itself are calculated as soon as new data becomes available. In practice, the score moves during the trading day, and each chart on the page shows a "last updated" time. Because the index is built from market data, it generally does not move while US markets are closed.
How do you read the Fear & Greed Index?
A few principles make the index more useful:
Extremes matter more than the middle. A move from 48 to 52 says almost nothing. Readings deep in extreme fear or extreme greed are where traders pay attention.
Direction matters. Compare today's score with last week and last month. Fear that is easing tells a different story from fear that is deepening.
Check the components. A low score driven by one indicator is different from all seven agreeing. CNN shows each component separately.
It describes, it does not predict. CNN itself frames the index as a way to gauge the mood of the market and suggests combining it with fundamentals and other tools.
What is the crypto Fear & Greed Index?
The crypto Fear & Greed Index is a separate index, published by Alternative.me, not by CNN. It also runs from 0 (extreme fear) to 100 (extreme greed), but it measures crypto sentiment, mainly Bitcoin, and it uses different inputs. As of October 2026, its page lists these weights:
Volatility: 25%
Market momentum and volume: 25%
Social media: 15%
Surveys: 15% (listed as currently paused)
Bitcoin dominance: 10%
Google Trends data: 10%
It updates once a day.
CNN vs crypto Fear & Greed Index
Feature | CNN Fear & Greed Index | Crypto Fear & Greed Index |
|---|---|---|
Publisher | CNN Business | Alternative.me |
Market | US stocks | Crypto, mainly Bitcoin |
Inputs | Seven market indicators, equally weighted | Volatility, momentum, social media, surveys, dominance, search trends, unequally weighted |
Updates | As new market data arrives | Daily |
Scale | 0 to 100 | 0 to 100 |
The two can disagree. Crypto and stocks often move together in sell-offs, but the crypto index also reacts to social media and search activity that the CNN index ignores.
How do traders use the Fear & Greed Index?
There are two common approaches.
As a contrarian signal
The classic idea is to buy when others are fearful and be careful when others are greedy. A contrarian trader might start buying a broad index fund when the score falls into extreme fear, or trim positions when it sits in extreme greed. The risk is obvious: fear can get deeper for weeks, and greed can last through long bull markets.
As a sentiment filter
A more modest use is as a filter on an existing strategy. For example, a swing trader might only take long pullback entries when sentiment is in fear, on the theory that pullbacks during fearful periods offer better prices. Or a breakout trader might skip new entries when greed is extreme. The index does not generate trades here. It only decides when your strategy is allowed to trade.
Does the Fear & Greed Index actually work?
Honest answer: the evidence is thin and mixed. Keep these limits in mind.
It is a composite of other indicators. Momentum, the VIX, put/call ratios and credit spreads are all widely watched on their own. Any signal in the index comes from those inputs, and it may add little beyond them.
Research is limited. A 2025 study in Finance Research Letters by Farrell and O'Connor found the index had a statistical predictive relationship with US equity index returns in 2011 to 2020, but a considerably weaker one in 2021 to 2024, and suggested the results may be driven by a stronger relationship before 2014. A statistical relationship is not the same as a profitable trading rule after costs.
Broader sentiment research is different. Academic work on investor sentiment, such as Baker and Wurgler (2007), studies its own sentiment measures and finds that small, young, volatile and unprofitable stocks are most exposed to sentiment swings. That does not validate CNN's index specifically.
Thresholds invite curve fitting. If you test many cutoffs (below 20, below 25, below 30) and keep the best one, you will likely find something that worked in the past by chance. Read our guide to spotting a curve-fit strategy.
We are not aware of evidence that the index alone gives a reliable trading edge. Treat it as context, then test whatever rule you build on it.
How do you test a Fear & Greed filter objectively?
The goal is to find out whether the filter improves a strategy, not to confirm that it does. A simple process:
Write the rule in plain English before looking at results. For example: "Buy SPY when it closes above its 20-day moving average after a 3-day pullback, but only when the Fear & Greed Index is below 40. Exit after 10 trading days or on a 5% stop loss."
Run the same strategy without the filter. This tells you what the filter adds or removes.
Compare both to buy and hold. Many timing rules lose to simply holding the index once you account for time out of the market.
Include costs and realistic fills. Spreads, slippage and stops that gap matter. See our order types guide.
Look at risk, not just return. A filter that cuts drawdowns but also cuts return may still be useful. Compare risk-adjusted measures.
Check the trade count and different periods. A filter that leaves only a handful of trades cannot tell you much. Split the history and see if the result holds in each part.
One practical warning: historical index data is not as easy to get as price data, and a backtest that uses a reading you could not have known at the time of the trade is invalid. Use the value available at the close before your entry.
Where Nvestiq fits
Nvestiq lets you describe a rule like the one above in plain English, and a deterministic compiler turns it into exact logic, never freeform code written by a language model. The backtest report shows what the strategy made, what it cost to hold, and whether to believe it, and it flags when buy and hold beat the strategy. You can paper trade it, connect Interactive Brokers, or export it to Python, Pine Script or JSON. Nvestiq is in early access, with public launch following final legal review.
Frequently Asked Questions
What is the Fear & Greed Index today?
Check CNN's page for the live reading. We do not quote a current value here because it changes during every trading day.
Who created the Fear & Greed Index?
The stock market version is published by CNN Business. The crypto Fear & Greed Index is a different product published by Alternative.me.
Is extreme fear a buy signal?
Not by itself. Some contrarian traders treat it as a reason to look for entries, but fear can deepen further, and research on the index's predictive value is limited and mixed. Test any rule before you use it.
What is the difference between fear and extreme fear?
In CNN's data, scores from 25 to 45 are labeled fear and scores below 25 are labeled extreme fear. The labels are bands on the same scale, not separate signals.
Does the Fear & Greed Index work for individual stocks?
It measures the broad US market, not any single company. A stock can rally in a fearful market or fall in a greedy one.
Related guides
Risk Disclosure
Trading involves substantial risk of loss. Past performance and backtested results do not guarantee future results. Nvestiq provides technology tools, not financial advice.