How to use the VIX to analyse forex market sentiment
Reading time: 8 minutes
When uncertainty creeps into financial markets, investors often look for ways to protect their portfolios. They may reduce their exposure to shares, move money into assets they consider safer or become more selective about where they invest. These changes can also affect currency markets, particularly currencies that tend to respond to shifts in global risk appetite.
One indicator that can help assess these changes is the VIX, often referred to as the fear index. It measures expected volatility in the S&P 500 over the next 30 days, based on options prices. The VIX doesn’t measure forex volatility or indicate whether share prices will rise or fall. Instead, it gives traders an idea of how much uncertainty investors expect in the US stock market.
For forex traders, this information can provide useful context. Understanding how to use the VIX to analyse forex market sentiment can help traders assess broader shifts in market behaviour.
Key Points
- The VIX measures expected 30-day volatility in the S&P 500, based on options prices.
- A rising VIX can signal weaker risk appetite, while a falling VIX may indicate greater investor confidence.
- Forex traders can use the VIX alongside currency charts, economic data and other indicators rather than treating it as a standalone trading signal.
What is VIX and what does it measure?
The Cboe Volatility Index (VIX) is a benchmark that measures the market’s expected volatility in the S&P 500 over the next 30 days. It draws on the prices of S&P 500 index options, both puts and calls.Those prices reflect what investors will pay for the right to buy or sell at a set price. When demand for options rises, especially for protective puts, prices climb and can push the VIX higher.
The VIX is expressed as an annualised percentage. A reading of 20 means implied annualised volatility of 20%. It doesn’t mean the S&P 500 is expected to fall by 20%. The fear index measures the expected size of price swings, not their direction.
How to interpret VIX levels
VIX readings are generally grouped into three broad ranges:
- Below 20: Relatively calm markets and lower expected volatility.
- 20 to 30: Greater uncertainty and increased demand for portfolio protection. Higher expected volatility and greater investor caution.
- Above 30: Elevated market stress and the possibility of larger price swings.
These ranges are guidelines, not fixed rules. A low VIX doesn’t mean markets are free from risk, and a high reading doesn’t signal an imminent crash. The pace and scale of the move matter too. A jump from 14 to 22, for example, can point to a meaningful change in sentiment even though the index remains below 30.
Why is the VIX used as an indicator in forex trading?
Although the VIX measures expected volatility in US equities, it can offer clues about investor confidence across global markets. When investor confidence is high, investors may favour higher-risk assets. This is known as a risk-on environment. Currencies such as the Australian dollar (AUD) and New Zealand dollar (NZD), which are sensitive to global growth expectations, may benefit.
When uncertainty rises, investors may reduce exposure to riskier assets and favour currencies considered safer. This is known as risk-off sentiment. The Japanese yen (JPY) and Swiss franc (CHF) have traditionally attracted safe-haven demand. The US dollar (USD) can also benefit, although its response depends on the source of uncertainty and US economic conditions.
These relationships are tendencies rather than guarantees. Interest rates and domestic economic developments can also influence currency moves.
How to use the VIX to assess forex market sentiment
Understanding the connection between the VIX and forex trading can help put individual currency movements into a wider market context, particularly when uncertainty affects several asset classes at the same time.
Watch for a rising VIX
A sustained rise in the VIX suggests investors are growing more worried and trimming risk. Forex traders look for safe-haven demand at these times. If the VIX jumps and USD/JPY starts to fall, for example, the move may reflect stronger demand for the yen.
However, this link isn’t automatic. Rising US interest rate expectations could support the dollar and offset pressure on USD/JPY. Traders therefore usually check what’s pushing the VIX higher before they assess the currency move.
Look for a falling VIX
A falling VIX can point to improving investor confidence and less demand for protection against share price declines. That tends to support risk-sensitive currencies. If the VIX falls while AUD/JPY rises, the move may reflect stronger demand for the Australian dollar against the yen. You can then check whether commodity prices, Chinese economic data or interest rate expectations back it up.
A lower VIX doesn’t always mean investors are taking more risk. It may simply reflect uncertainty fading after a major announcement, so look for other signals to confirm that sentiment has improved.
Compare the VIX with currency pairs
Traders often plot the VIX next to selected pairs to spot links between equity sentiment and forex moves. AUD/JPY is a popular risk-sentiment pair because the Australian dollar responds to global growth expectations while the yen can attract safe-haven demand. Similarly, AUD/USD shows how the Australian dollar fares against the USD as risk appetite changes.
Neither pair replaces the VIX. Interest rates, inflation, data releases and domestic news also drive them. Comparing the charts shows whether broader sentiment or something else is steering the market.
Check whether the move is supported by other markets
The VIX becomes more useful when it forms part of a wider market assessment. Traders often compare it with:
- Equity indices: Rising VIX alongside falling US share prices may reinforce signs of risk aversion.
- Bond yields: Changes in government bond yields can indicate shifts in expectations for interest rates and demand for safer assets.
- Gold: Stronger gold prices may accompany increased demand for defensive assets, although gold has its own drivers.
- Commodity prices: Oil and industrial metals can offer clues about growth expectations and demand for commodity-linked currencies.
Traders often look for agreement between different markets. If the VIX rises but equity indices remain firm and safe-haven currencies show little strength, the signal may be less convincing.
VIX-based forex trading strategies
The VIX is a sentiment indicator, so it is generally considered better suited to supporting a trading decision rather than to find an entry point. Popular approaches to using the VIX as a forex indicator include:
Risk-on and risk-off trading
This approach involves monitoring changes in the VIX to identify shifts in broader market appetite. A falling VIX, rising equity indices and stronger AUD/JPY may point to improving risk sentiment. A trader could then look for a suitable buying opportunity in the pair using price action or technical indicators. Conversely, a rising VIX and falling AUD/JPY may suggest growing risk aversion. A trader could watch for a confirmed bearish setup rather than selling simply because the VIX has increased.
Breakout confirmation
A sharp change in the VIX can help traders assess whether a currency pair’s breakout is supported by broader market sentiment. For example, suppose AUD/JPY moves above a resistance level. If the VIX is also falling and equity markets are gaining, the wider market environment may support the breakout. If the VIX is rising sharply instead, traders may want to be more cautious and look for additional confirmation from price action or technical indicators.
News trading
Major economic releases and geopolitical developments can affect both equity and forex market volatility. Traders often monitor the VIX around events such as US Federal Reserve decisions, US inflation reports, employment data and unexpected geopolitical developments. A sudden increase in the VIX following an announcement may indicate that investors are reassessing risk. However, the initial market reaction can be short-lived, and currency movements may differ depending on the event. Traders usually check the underlying news and avoid assuming that every VIX spike will lead to a sustained move in safe-haven currencies.
Limitations of using the VIX in forex trading
The VIX measures expected volatility in US equities, not forex. Currency markets have their own drivers, including central bank decisions, inflation, trade developments and political events, which the index doesn’t directly measure. Safe-haven currencies also don’t respond in the same way to every market shock. Interest-rate differences and domestic economic conditions can outweigh broader risk sentiment.
The VIX also says nothing about market direction. A higher reading signals greater expected volatility in the S&P 500, not necessarily falling share prices or a strengthening currency. Sudden spikes can also reverse quickly.
For these reasons, traders typically combine the VIX with technical analysis, economic calendars, bond yields and other market indicators. They also monitor volatility in the currency pair itself rather than assume that US equity moves will carry over into forex.
Bringing the VIX into your forex analysis
The VIX offers forex traders another way to assess the mood of the wider financial market. However, it is usually treated as a supporting indicator, not a trading signal. FP Markets provides access to forex markets alongside trading tools and educational resources that can help traders develop their market analysis. Understanding how indicators such as the VIX fit into a broader strategy can help traders make more informed decisions, while keeping risk management central to every trade. Open an account to practise using the VIX.
Frequently asked questions (FAQs)
The VIX provides an indication of expected volatility in the S&P 500 and can help forex traders assess broader investor risk sentiment. It does not measure forex volatility directly.
Not necessarily. A high VIX can coincide with increased demand for safe-haven currencies, but the currency’s direction also depends on interest rates, economic data and the cause of the market uncertainty.
AUD/JPY and NZD/JPY are commonly watched because they compare currencies that can be sensitive to global risk appetite with the yen, which often attracts safe-haven demand. Their movements are not determined by the VIX alone.
