These terms appear in the dashboard and cards on this page:

Understanding Common Volatility

COVOL (Common Volatility) measures the systematic volatility component that affects all assets in a group simultaneously. When COVOL is high, diversification benefits diminish because assets tend to move together.

Page Layout

The page has these main sections from top to bottom:

• 1. Composite COVOL Dashboard

  The header shows the Composite COVOL Index value, percentile rank, and last update time. Below it are three visualization components.

• Stress Timeline (top)

  Time series chart showing COVOL history. Use VIEW OPTIONS to switch between chart modes and the time range buttons to adjust the visible period.

• Stress Decomposition (bottom left)

  Shows the PC1 value, percentile, and four horizontal meter bars displaying each analysis's residual contribution.

• Radar Chart (bottom right)

  Visualizes analysis residual contributions. Click the buttons below the chart to highlight specific analyses.

• 2. Individual COVOL Analyses

  Four cards below the dashboard: Country-Level ETF, Asset Class, Oil and Gas, and Commodities. Each shows current COVOL level, HIGH/MODERATE/LOW indicator with color bar, trailing 12-month sparkline, and Top 5 historical events table. Click 'Go to analysis page' on any card to view detailed analysis.

Historical Event Database

Each analysis tracks its highest-COVOL dates with documented event descriptions:

• Curated Event Database

  V-Lab researchers document what drove each major COVOL spike: financial crises, policy announcements, geopolitical events.

• Global Coverage

  Events span global markets including the 2008 financial crisis, COVID-19 pandemic, Brexit, and regional shocks.

• Pattern Recognition

  Compare current stress levels to historical events to gauge severity and understand potential market dynamics.

Four COVOL Analyses

The page tracks systematic volatility across four asset groupings:

• Country-Level ETF

  National stock indices representing major economies. Captures country-specific and global systematic shocks.

• Asset Class

  Global sector indices spanning industries. Shows how systematic volatility affects different parts of the economy.

• Oil and Gas

  Energy-related assets. May spike during oil price shocks, geopolitical events affecting energy supply, or climate policy announcements.

• Commodities

  Oil, gold, and other commodity assets. Responds to supply shocks, inflation concerns, and safe-haven flows.

Statistical Foundation

COVOL is built on rigorous econometric methods:

• Multiplicative Factor Model

  Based on Engle & Campos-Martins (2023). Unlike additive models where factors sum together, multiplicative models capture how volatility shocks amplify across assets during crises - when one asset's volatility rises, it scales up the common factor affecting all assets.

• Variance Decomposition

  Separates systematic from idiosyncratic volatility, showing how much of each asset's volatility comes from the common factor.

• Real-Time Monitoring

  Daily updates with the latest market data. The 'Last updated' timestamp shows when the dashboard was last refreshed.

Using the Stress Timeline

The Stress Timeline chart shows COVOL history with several interactive features. For more details, click the help icon (?) next to 'COVOL Composite Index' in the header.

• VIEW OPTIONS Button

  Click to open a dropdown with three chart modes: 'Composite Overview' shows the single aggregated index line. 'Analysis Residuals' shows separate lines for each analysis's deviation from PC1. 'Analysis COVOL Indices' shows each analysis's individual COVOL value. Check 'Stacked' to see them as a stacked area chart.

• Time Range Buttons

  Below the chart, click 6M, 1Y, 2Y, 5Y, 10Y, or All to change the visible date range. The default is 1Y (one year). Click the calendar icon to open a custom date picker for precise date selection.

• Hover and Click

  Hover over the chart to see a tooltip with values at that date. Click to freeze the display on that date. The Stress Decomposition panel and radar chart will update to show values as of the selected date. Click again or drag to a new date to update.

Reading the Stress Decomposition Panel

The Stress Decomposition panel breaks down total stress into components:

• Systematic Component (PC1)

  Shows the PC1 value (e.g., 1.0563) and what percentage of total stress it represents (e.g., 92.0%). When this percentage is high, the common market factor is driving most volatility.

• Max Analysis Residual

  Shows which analysis has the largest residual and its percentage of total stress. This identifies the dominant source of analysis-specific stress.

• Analysis Residual Meters

  Four horizontal meter bars show each analysis's residual. Bars extending right (positive) mean that analysis adds stress above PC1. Bars extending left (negative) mean it's below the systematic baseline. Longer bars indicate larger deviations.

Using the Radar Chart

The radar chart visualizes analysis residual contributions:

• Reading the Chart

  Each axis represents one analysis (Country Risk, Asset Class, Oil & Gas, Commodities). The shape shows relative residual contributions. Axes extending further outward have larger positive residuals.

• Analysis Buttons

  Below the chart are four buttons showing each analysis and its residual value. Hover over a button to highlight that analysis on the radar chart.

• Interpreting the Shape

  A balanced shape (all axes similar length) means stress is evenly distributed. A lopsided shape (one axis much longer) means that analysis is contributing disproportionate stress above the systematic baseline.

Using the Analysis Cards

Each card provides a summary for one COVOL analysis:

• Current COVOL Level

  Shows the raw COVOL value for that analysis (e.g., 0.80528). Note this differs from the smoothed Composite COVOL Index in the header.

• Stress Indicator

  A colored bar with LOW, MODERATE, or HIGH label shows where current stress stands historically. Green = low risk, yellow = moderate, red = elevated.

• Trailing 12-Month Sparkline

  A mini chart showing recent COVOL trends. Rising lines indicate building stress; falling lines suggest normalization.

• Top 5 Events Table

  Lists the five highest-COVOL dates for this analysis with event descriptions. Compare current levels to these historical peaks.

• Go to Analysis Page

  Click this button at the bottom of each card to open the detailed COVOL Analysis page for that dataset, with full time series, loadings table, and event history.

Interpreting the Numbers

Understanding what the values mean helps you assess market conditions:

• Composite COVOL Index Value

  The header shows a smoothed aggregate value. Higher values mean more systematic stress. Compare current levels to historical peaks using the Stress Timeline to gauge severity.

• Percentile Reading

  The '88% PERCENTILE SYSTEMATIC' means current PC1 stress is higher than 88% of historical observations. Above 80% warrants attention; above 95% indicates exceptional stress.

• PC1 Percentage

  The Stress Decomposition shows '92.0% of total'. This means 92% of current stress comes from the systematic factor. When PC1 exceeds 85-90%, the common factor dominates and diversification is less effective.

• Residual Values

  Residuals near zero mean the analysis tracks PC1 closely. Larger positive residuals indicate that analysis is adding stress above the systematic baseline. Negative residuals mean it's below the baseline.

Methodology Overview

COVOL is calculated using a multiplicative factor model that captures how volatilities move together across assets.

Data Updates

• Daily Updates

  COVOL is recalculated daily with the latest market data. The 'Last updated' timestamp in the header shows when the dashboard was last refreshed.

• Event Documentation

  Historical events are documented by V-Lab researchers. New events are added as they occur and affect COVOL levels.

• Time-Varying Dynamics

  Factor loadings and COVOL levels change over time as market conditions evolve. Use different time ranges to see how stress has evolved.

Understanding COVOL

What does COVOL measure?

COVOL measures the common volatility component that affects all assets in a group simultaneously. When COVOL is high, assets move together more strongly, reducing diversification benefits.

Why do some analyses show higher COVOL than others?

Each analysis covers assets with different sensitivity to global shocks. Country-Level ETF and Asset Class tend to have higher baseline COVOL due to broader economic exposure. Oil and Gas and Commodities may spike during energy-specific events.

What's the difference between COVOL and COVOL Index?

COVOL is a raw variance-like quantity. The COVOL Index is a smoothed version: a 22-day moving average of the square root of COVOL. The Stress Timeline shows the COVOL Index because it's a more persistent measure of stress than raw COVOL values. The Composite header shows the aggregated COVOL Index; individual cards show raw COVOL values.

Why does COVOL spike during certain periods?

COVOL spikes when volatility increases simultaneously across many assets, typically during market stress events like financial crises, geopolitical shocks, or pandemics. The Top 5 events on each card show historical examples.

What's the difference between systematic stress and analysis residuals?

Systematic stress (PC1) is the common factor affecting all analyses simultaneously. Analysis residuals show which specific analyses are adding or subtracting volatility relative to PC1. Positive residuals mean extra stress above the baseline; negative residuals mean less stress than the baseline.

Using the Page

How do I download the data?

Click the download button in the header (you must be logged in). For analysis-specific data, go to each analysis's page via the 'Go to analysis page' button and use the download options there.

How do I change the time range?

Use the buttons below the Stress Timeline: 6M, 1Y, 2Y, 5Y, 10Y, or All. Click the calendar icon to open a custom date picker for precise date selection.

How do I see detailed analysis for a specific dataset?

Click the 'Go to analysis page' button at the bottom of any analysis card. You can also use the search bar in the main navigation: select COVOL as the application, then search for your dataset. The full COVOL Analysis page shows time series, loadings table, and event documentation.

How do I switch between different chart views?

Click the VIEW OPTIONS button above the Stress Timeline. Choose Composite Overview (single line), Analysis Residuals (deviations from PC1), or Analysis COVOL Indices (individual values, with optional stacking).

Reading the Visualizations

Common questions about interpreting what you see:

What do the meter bars in Stress Decomposition show?

The four meter bars show each analysis's residual (its deviation from PC1). Bars extending right (positive) mean that analysis adds stress above the systematic baseline. Bars extending left (negative) mean it's below the baseline. The length indicates magnitude.

What do the colors on the analysis cards mean?

The color bar shows percentile rank: GREEN with LOW means stress is in the lower range historically. YELLOW with MODERATE means average stress. RED with HIGH means elevated stress compared to historical distribution.

How do I read the radar chart?

Each axis represents one analysis (Country Risk, Asset Class, Oil & Gas, Commodities). The distance from center shows the residual value. Click the buttons below the chart to highlight an analysis. A lopsided shape means one analysis is contributing disproportionate stress.

What does '92% of total' mean for PC1?

It means 92% of current stress comes from the systematic component (PC1) that affects all analyses. The remaining 8% comes from analysis-specific residuals. When PC1 exceeds 85-90%, diversification is less effective because the common factor dominates.

Building Your Analysis

• Review Historical Context

  Check the Top 5 events on cards showing elevated stress. Compare current levels to past crises like 2008 or COVID-19.

• Monitor Stress Evolution

  Use the Stress Timeline to track how stress has evolved. Click 5Y or 10Y to see longer history. Watch for rising or falling trends.

• Analyze Stress Sources

  Check the Stress Decomposition panel. If PC1 is 90%+, stress is broadly systematic. If one analysis shows a large residual, that sector is the primary driver.

• Drill Into Specific Analyses

  Click 'Go to analysis page' on cards with elevated stress, or use the search bar in the main navigation to find specific COVOL datasets. Analysis pages show asset-level loadings and detailed event history.

Advanced Applications

• Volatility Trading Strategies

  Use COVOL to monitor systematic volatility levels. Volatility tends to mean-revert, so elevated COVOL may signal potential short-volatility opportunities for experienced traders.

• Academic Research

  Download data for econometric analysis. Study how common volatility evolves across different market regimes.

• Policy Analysis

  Track how policy announcements and geopolitical events affect systematic volatility. Compare COVOL spikes to event dates.

• Portfolio Construction

  During high COVOL, diversification is less effective. Use analysis pages to find assets with low factor loadings.