Direct Answer
The cumulative return of an asset divided by the cumulative return of a benchmark, both measured from the same start date, so the ratio equals 1 at the start. It shows by what multiple the asset has outperformed or trailed since then. A value above 1 means the asset has outperformed since the start date and below 1 means it has underperformed.
Relative Performance Ratio: Formula, Meaning, Signals, Examples and How to Use It
How Is Relative Performance Ratio Calculated?
The cumulative return of an asset divided by the cumulative return of a benchmark, both measured from the same start date, so the ratio equals 1 at the start. It shows by what multiple the asset has outperformed or trailed since then.
Formula: Ratio = (asset price now / asset price at start) / (benchmark now / benchmark at start)
Inputs:
- Asset price series
- Benchmark price series
- A common start date
Worked example. If an asset rises from 100 to 120 while the benchmark rises from 100 to 110, the ratio is 1.091. The inputs are illustrative numbers, not market data.
Reading it. A value above 1 means the asset has outperformed since the start date and below 1 means it has underperformed. Because it is rebased to 1, the ratio can be compared across assets and periods.
Limits. The result depends on the start date, which can be picked to flatter or hurt an asset. Unlike a raw price ratio, it is meaningful only for the chosen window.
What is Relative Performance Ratio?
The cumulative return of an asset divided by the cumulative return of a benchmark, both measured from the same start date, so the ratio equals 1 at the start. It shows by what multiple the asset has outperformed or trailed since then.
How to use Relative Performance Ratio
A value above 1 means the asset has outperformed since the start date and below 1 means it has underperformed. Because it is rebased to 1, the ratio can be compared across assets and periods. A reading alone is never a buy or sell signal; it needs context from price structure, volume, volatility and the broader market regime.
Strengths
- Starting both series on one date makes the ratio equal 1 at the origin, so later values read as a multiple of outperformance.
- Cumulative return on each side is compared geometrically, so compounding is handled consistently across the window.
- Reproducible when the formula and data convention are fixed.
Weaknesses and limitations
- Both legs include the full path since the start, so one large early move keeps dominating the ratio long afterward.
- The ratio says nothing about the volatility or drawdown each leg experienced, so equal values can come from very different paths.
- Correlated indicators can create false confidence by repeating the same underlying information.
Editorial and risk note
This page is educational content, not individualized investment advice. It should not imply guaranteed prediction, accuracy or outperformance.
Frequently Asked Questions
Is Relative Performance Ratio a buy or sell signal?
No. A value above 1 means the asset has outperformed since the start date and below 1 means it has underperformed. The result depends on the start date, which can be picked to flatter or hurt an asset. A trade built on it still needs a trigger, an invalidation rule, a position size and realistic execution assumptions.
What is the best setting for Relative Performance Ratio?
Relative Performance Ratio is computed from asset price series; benchmark price series; a common start date, so the choices that matter are the data convention and the window it is read over. Test those across instruments, regimes and out-of-sample periods instead of fitting one historical winner.
Can Relative Performance Ratio be used by itself?
The result depends on the start date, which can be picked to flatter or hurt an asset. Unlike a raw price ratio, it is meaningful only for the chosen window. For that reason it is read next to measures of direction, participation, valuation, liquidity and risk, not alone.
Does Relative Performance Ratio work on every timeframe?
The calculation (Ratio = (asset price now / asset price at start) / (benchmark now / benchmark at start)) can be run on any bar size, but behavior is not portable: a reading on a five-minute chart describes a very different market window from the same reading on a daily chart. Validate the exact timeframe before relying on it.
Why does Relative Performance Ratio give false signals?
Both legs include the full path since the start, so one large early move keeps dominating the ratio long afterward. The ratio says nothing about the volatility or drawdown each leg experienced, so equal values can come from very different paths. Lag, noise and regime changes add to this, because market participants react to new information after the reading is calculated.
How should Relative Performance Ratio be backtested?
Rebuild Relative Performance Ratio from asset price series using point-in-time data, write the rules before testing, include delisted securities where relevant, model realistic fills and costs, reserve a validation sample and compare with a simpler baseline.