Understanding market volatility in today’s trading environment

David Morrison

SENIOR MARKET ANALYST

17 Sep 2025

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Volatility is an inherent risk with any trading endeavour, so it’s critical for any trader to understand the different factors that can affect market volatility and be prepared for any fluctuations that could impact their accounts. Here, we’ll provide a deep dive into the world of market volatility and why it’s so critical for traders to understand and be prepared for it.

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What is market volatility?

Market volatility refers to the degree and frequency of price fluctuations in an asset or market over time. Unlike directional trends, volatility is neutral, reflecting both upward and downward movements. Traders often measure it using tools like standard deviation, which shows how far prices deviate from their average, or beta, which compares a security’s movements against a broader benchmark such as the S&P 500. These measures help quantify uncertainty and provide insight into how prices behave.

Volatility is closely tied to risk and uncertainty. Sudden swings often follow policy announcements, economic data releases, corporate earnings, or geopolitical events. The CBOE Volatility Index (VIX) - widely known as the “fear gauge” - captures market expectations of future volatility through options pricing. When the VIX rises, it typically signals increased caution and shifting investor confidence.

For traders, volatility carries different meanings. Long-term investors generally see it as a risk to manage, often through diversification or by maintaining discipline during turbulent periods. Short-term traders, however, often view volatility as an opportunity. Rapid price swings can create conditions for strategies such as breakout trading or mean reversion, while sharp declines may open the door to discounted entry points.

Volatility is commonly divided into two types: historical and implied. Historical volatility measures actual price movements over a set timeframe, offering a record of past risk. Implied volatility, on the other hand, is forward-looking and is derived from options markets to gauge expectations of future movement. Indices like the VIX capture this outlook and often rise before major downturns. Together, these measures allow traders to assess both past behaviour and anticipated sentiment.

For a further deep dive into the world of trading, take a look at our guides to fundamental analysis and technical analysis, or keep up to date on the latest news with our market insights.

Key drivers behind market volatility

Market volatility stems from a combination of economic forces, political developments, investor psychology, and technological dynamics. It is not random but the result of identifiable drivers that often interact in complex ways. Recognising these influences helps traders better understand risk and prepare for shifting market conditions.

Volatility is commonly viewed through three main lenses. The first is economic and political fundamentals, which define the broader market environment. The second is human behaviour, where emotions such as fear and greed can significantly influence decision-making. The third is technology, particularly the rise of algorithmic and high-frequency trading, which has amplified both risks and opportunities.

Economic and political forces shaping volatility

Financial markets are highly sensitive to core economic indicators such as GDP growth, inflation, and unemployment. These data points influence investor confidence and shape expectations for future returns.

Central banks play a pivotal role through monetary policy: interest rate decisions directly affect borrowing costs for households and businesses, often triggering sharp price swings. For example, the US Federal Reserve’s rate hikes in 2022 and 2023 sparked rapid market repricing as investors reassessed global growth prospects.

Corporate activity also drives volatility. Earnings reports, product launches, and strategic decisions can move individual share prices and, in turn, ripple across broader indices. Political and geopolitical events add another layer of uncertainty. Conflicts, trade disputes, and natural disasters frequently prompt immediate market reactions.

While external shocks such as the 9/11 attacks or the Russia-Ukraine war often lead to sharp but short-lived declines, more persistent challenges - like prolonged inflation or systemic financial crises - tend to reshape volatility in lasting ways. For traders, distinguishing between temporary disruptions and structural risks is crucial when navigating unstable conditions.

Investor behaviour and the psychology of volatility

While economic data and policy decisions provide the foundation of market movement, human behaviour often determines how volatility unfolds. Emotions such as fear and greed influence decision-making in ways that diverge from rational analysis. During downturns, fear can drive panic selling, fuelled by loss aversion - the tendency to feel the pain of losses more intensely than the satisfaction of gains.

The 2008 Financial Crisis illustrated this dynamic, as widespread selling amplified the depth of the crash. Herd mentality can intensify these patterns, with traders following the crowd rather than their own analysis.

Greed operates on the opposite side of the spectrum, fostering overconfidence and speculative bubbles. In rising markets, traders often overestimate their ability to predict trends, pushing valuations beyond sustainable levels.

The dot-com bubble of the late 1990s demonstrated how optimism about unproven business models, paired with the ‘Greater Fool Theory’, drove asset prices far above intrinsic value. Together, these examples highlight how behavioural finance helps explain market cycles: fear accelerates downturns, while greed stretches valuations until corrections inevitably occur.

Technology, automation, and the risks of modern trading

The rise of algorithmic trading (AT) and high-frequency trading (HFT) has fundamentally reshaped how markets operate. Today, algorithms account for the majority of trades on major exchanges, improving liquidity and accelerating price discovery. Yet, these same systems can also heighten short-term volatility when errors or misread signals cascade through markets.

The 2010 Flash Crash is a stark example, when automated selling wiped nearly a trillion dollars in minutes before prices recovered. Similarly, the 2012 Knight Capital glitch showed how a single faulty program could generate losses of hundreds of millions in under an hour.

Technology also interacts with human psychology, creating powerful feedback loops. Algorithms are programmed to respond instantly to price movements, amplifying herd behaviour on a scale far beyond human capability. This acceleration means that even minor disruptions can escalate into systemic risks.

In today’s markets, volatility is no longer driven solely by economic and behavioural factors - the speed and scale of automation also shape it. For traders, recognising this link between technology and sentiment is essential to managing risk in a system where small errors can have outsized consequences.

A deep dive into volatility indices

Volatility indices give traders a real-time gauge of market risk and investor sentiment. Built on option pricing models, they distil expectations of future price swings into a single figure. The CBOE Volatility Index (VIX) is the most widely recognised, reflecting implied volatility in US equity markets tied to the S&P 500 options prices. Similar indices are also published globally, offering a broader view of regional risk conditions.

These indices have become vital tools for traders and portfolio managers. They highlight potential stress points in the market and also help anticipate shifts in confidence. By tracking volatility indices, market participants can prepare for turbulence, adjust positioning, and identify opportunities for hedging against downside risk.

The CBOE Volatility Index (VIX): Understanding the “Fear Gauge”

First introduced in 1993, the VIX is derived from option prices on the S&P 500. By combining near-term and next-term contracts, it generates a constant 30-day implied volatility measure, expressed as an annualised percentage. Unlike historical volatility, the VIX is forward-looking, capturing expectations of future price swings rather than recording past movements.

Interpreting the index is relatively straightforward. Readings below 15 suggest stable conditions, while levels above 30 indicate heightened uncertainty and a greater likelihood of sharp market moves. Because the VIX reflects demand for protective put options, it serves as both a barometer of risk and a measure of how investors hedge against downturns. For this reason, it has become the most widely followed indicator of US market sentiment.

Global Volatility Indices Beyond the VIX

While the VIX often dominates market headlines, many regions track their own measures of implied volatility. In the UK, the FTSE 100 Implied Volatility Index (IVI) provides a gauge of risk, while Germany’s VDAX-NEW does the same for the DAX index. Japan follows suit with the Nikkei 225 Volatility Index. These regional tools allow traders to monitor sentiment and risk conditions across major economies.

Alongside regional measures, broader benchmarks also exist. For example, the MSCI ACWI Minimum Volatility Index represents a lower-risk equity strategy by applying variance-based weighting across global markets. Together, these indices create a network of indicators that offer traders a worldwide perspective on volatility trends and cross-market sentiment.

Index name

Country/Region

Underlying market index

Purpose

VIX

United States

S&P 500 (SPX)

Measures the market's expectation of 30-day forward-looking volatility.

FTSE 100 IVI

United Kingdom

FTSE 100

Measures the 30-day, 60-day, and 90-day annualised implied volatility.

VDAX-NEW

Germany

DAX

Expresses the anticipated volatility of the DAX for the next 30 days.

Nikkei 225 VI

Japan

Nikkei 225

Indicates the expected degree of fluctuation of the Nikkei 225 in the future.

MSCI ACWI Volatility Tilt Index

Global

MSCI ACWI

Reflects a low-volatility strategy applied to global large and mid-cap equities.

Trading volatility through derivatives

Although the VIX itself is not directly tradable, its methodology has been adapted into futures and options contracts that track volatility. These products have transformed volatility into its own asset class, extending its role beyond risk measurement. For traders, they serve two primary purposes: hedging against equity market declines and speculating on changes in implied volatility.

As a hedge, VIX futures and options often rise when equity prices fall, offering protection during turbulent periods. Speculators, meanwhile, can employ strategies such as straddles or strangles to profit from sharp moves, regardless of direction. This evolution has made volatility products a central feature of modern trading and risk management, enabling participants to buy and sell volatility much like any other asset.

Volatility across asset classes

Although most commonly associated with equities, volatility is a defining characteristic of all financial markets. Each asset class responds to unique drivers: bonds react to interest rate shifts, foreign exchange to macroeconomic and policy changes, and cryptocurrencies to liquidity conditions and speculative sentiment. Recognising these differences is essential for traders seeking to manage risk effectively across diverse markets.

Volatility in bond markets

Bonds are often viewed as more stable than equities, but they are far from immune to volatility. The primary driver is interest rates, which move inversely to bond prices. Existing bonds with lower yields lose value when rates rise as new, higher-yielding bonds enter the market. When rates fall, the reverse occurs: existing bonds with higher coupons become more attractive, lifting their prices.

Periods of rapid monetary policy shifts can magnify these dynamics. Central bank tightening cycles - such as the Federal Reserve’s aggressive rate hikes to combat inflation - have triggered sharp moves across both government and corporate bond markets. Even though bonds are traditionally seen as safer assets, traders and portfolio managers must account for their sensitivity to interest rate changes.

The unique dynamics of Forex volatility

The foreign exchange (forex) market experiences volatility through fluctuations in currency pair values. Unlike equities, forex volatility is primarily driven by macroeconomic and geopolitical factors. Economic strength and political stability influence the scale of movements: currencies tied to stable economies, such as the U.S. dollar or euro, typically move more steadily, while those linked to less stable or politically uncertain regions can swing sharply.

Interest rate differentials are another major factor. When yields diverge significantly between two countries, capital tends to flow toward the higher-yielding currency, generating volatility. Liquidity also plays a role: major pairs like EUR/USD usually exhibit smoother price action, whereas emerging market pairs such as USD/TRY, USD/ZAR, or USD/BRL can experience outsized swings due to geopolitical risk, commodity price changes, and shifts in global sentiment.

Volatility in cryptocurrency

Cryptocurrency markets are renowned for their extreme volatility. Unlike traditional assets, digital currencies often operate without a clear regulatory framework, leaving them susceptible to speculation and manipulation. Their relatively small market size and limited liquidity mean that even modest buying or selling pressure can trigger large price swings.

Another major factor is the absence of tangible backing. While fiat currencies are supported by governments and bonds by issuers’ creditworthiness, most cryptocurrencies derive value solely from market demand.

Social media sentiment, speculative forecasts, and sudden shifts in adoption trends can therefore spark dramatic rallies or crashes. This combination of structural fragility and speculative behaviour makes crypto one of the most unpredictable asset classes.

A historical perspective on market volatility

Financial market history is marked by periods of extreme volatility. Each major shock reflects the interplay of economic forces, human behaviour, and unforeseen events, offering enduring lessons for traders. Examining these episodes helps market participants understand how volatility emerges, evolves, and impacts different asset classes over time.

The 2008 global financial crisis and volatility

Before the 2008 crisis, market volatility was relatively low, with the VIX hovering around 12. As the credit bubble burst, fear surged: the S&P 500 fell roughly 56% from October 2007 to March 2009, while the VIX more than tripled, reaching a closing high of 80.74 and an intraday peak of 89.53.

This episode highlighted a critical asymmetry: the negative correlation between the VIX and equities is uneven. When fear spikes, equity markets decline more sharply than they recover when fear abates. This “leverage effect” illustrates how sudden surges in risk perception can inflict disproportionate damage on financial markets.

The COVID-19 market shock of 2020

The COVID-19 pandemic delivered a true black swan event, surpassing previous volatility records. In March 2020, as global economies shut down, the VIX spiked to 82.69 - the highest closing level since its inception. Unlike the Global Financial Crisis, this shock originated from an unpredictable health crisis. With no precedent or playbook, markets reacted with panic, driving unprecedented demand for downside protection and pushing volatility to extremes rarely seen in modern financial history.

In recent years, volatility has been shaped by shifting macroeconomic expectations and political risk. From 2023 onward, markets became highly sensitive to Federal Reserve policy surprises, often selling off when hopes for rate cuts faded.

In 2025, political risk dominated the agenda. The new U.S. administration’s unexpectedly broad tariff measures triggered a VIX jump of 30.8 points in April - a move in the 99.9th percentile of all changes since 1990. While panic soon subsided, the episode highlighted a key lesson: volatility often reflects the gap between expectations and reality, rather than the news itself.

Event

Date

VIX change

S&P 500 change

Tariff Announcement

Apr 2, 2025 – Apr 8, 2025

+30.8

-12.9%

Pre-Tariff Jitters

Mar 5, 2025 – Mar 10, 2025

+5.9

-4.7%

Early 2025 Policy Fears

Feb 20, 2025 – Feb 27, 2025

+5.5

N/A


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