> ## Documentation Index
> Fetch the complete documentation index at: https://docs.chicago.global/llms.txt
> Use this file to discover all available pages before exploring further.

# Benchmark

> Understanding benchmarks - the standards for measuring investment performance

A benchmark is a standard against which investment performance is measured. Choosing the right benchmark is critical - the wrong benchmark makes performance comparisons meaningless.

## Beginner

### What It Means

A benchmark is your measuring stick. It answers: "Compared to what?" When you say your portfolio returned 12%, the natural question is whether that's good or bad. A benchmark provides context.

### Common Benchmarks

| Asset Class             | Common Benchmarks                |
| ----------------------- | -------------------------------- |
| US Large-Cap Stocks     | S\&P 500                         |
| US Total Market         | Russell 3000, Wilshire 5000      |
| US Small-Cap            | Russell 2000                     |
| International Developed | MSCI EAFE                        |
| Emerging Markets        | MSCI Emerging Markets            |
| US Bonds                | Bloomberg US Aggregate           |
| 60/40 Portfolio         | 60% S\&P 500 / 40% Bloomberg Agg |

### Portfolio Example

Your US large-cap portfolio returned 12% this year. How did you do?

| Benchmark    | Return | Your Performance     |
| ------------ | ------ | -------------------- |
| S\&P 500     | 10%    | Beat by 2%           |
| Russell 1000 | 11%    | Beat by 1%           |
| Nasdaq       | 15%    | Underperformed by 3% |

The benchmark you choose changes the story entirely.

### Why It Matters

Without a benchmark, you can't evaluate performance. A 15% return sounds great, but not if the market returned 25%. A 5% return sounds weak, but not if the market lost 10%.

***

## Advanced

### Benchmark Characteristics

A good benchmark should be:

| Characteristic                  | Description                      |
| ------------------------------- | -------------------------------- |
| **Investable**                  | Can actually buy the benchmark   |
| **Measurable**                  | Returns can be calculated        |
| **Appropriate**                 | Matches the investment mandate   |
| **Unambiguous**                 | Clearly defined constituents     |
| **Specified in Advance**        | Not changed after the fact       |
| **Reflective of Opportunities** | Represents available investments |

### Benchmark Mismatch

<Warning>
  **Benchmark mismatch** is comparing a portfolio to an inappropriate benchmark. A small-cap value fund shouldn't be compared to the S\&P 500 - it should be compared to a small-cap value index.
</Warning>

**Common Mismatches:**

* Comparing global funds to US-only benchmarks
* Comparing concentrated portfolios to broad indices
* Comparing multi-asset portfolios to equity-only benchmarks

### Index Construction Methods

| Method                     | Description                      | Examples              |
| -------------------------- | -------------------------------- | --------------------- |
| **Market-Cap Weighted**    | Larger companies = bigger weight | S\&P 500, MSCI        |
| **Equal Weighted**         | All stocks weighted equally      | S\&P 500 Equal Weight |
| **Price Weighted**         | Higher price = bigger weight     | Dow Jones             |
| **Factor Weighted**        | Weighted by factor scores        | Smart beta indices    |
| **Fundamentally Weighted** | Weighted by earnings, sales      | FTSE RAFI             |

### Custom Benchmarks

When no standard index fits, create a custom benchmark:

```
Example Custom Benchmark:
- 50% S&P 500
- 30% MSCI EAFE
- 20% Bloomberg Aggregate

This matches a global balanced portfolio better than any single index.
```

### Benchmark-Relative Metrics

| Metric                | Formula                  | What It Measures             |
| --------------------- | ------------------------ | ---------------------------- |
| **Active Return**     | Portfolio - Benchmark    | Raw outperformance           |
| **Tracking Error**    | Std Dev of Active Return | Consistency of difference    |
| **Information Ratio** | Active Return / TE       | Risk-adjusted outperformance |
| **Beta**              | Sensitivity to benchmark | Market exposure              |

### Benchmark Hugging vs. High Active Share

| Behavior       | Active Share | Tracking Error | Fee Appropriateness    |
| -------------- | ------------ | -------------- | ---------------------- |
| Closet Indexer | Low          | Low            | Overpaying             |
| True Active    | High         | Higher         | Appropriate if skilled |
| Index Fund     | Very Low     | Very Low       | Appropriate            |

### Gaming Benchmarks

Managers may choose easy-to-beat benchmarks:

| Tactic             | Example                                       |
| ------------------ | --------------------------------------------- |
| **Cash Drag**      | Compare equity fund to cash-heavy benchmark   |
| **Style Mismatch** | Growth fund vs. broad market                  |
| **Survivorship**   | Compare to indices with failed stocks removed |

<Note>
  Always verify that the benchmark is truly appropriate for the strategy. Outperformance vs. the wrong benchmark is meaningless.
</Note>

### Peer Benchmarking

Alternative to index benchmarks:

| Approach        | Pros                        | Cons                                  |
| --------------- | --------------------------- | ------------------------------------- |
| Index Benchmark | Clear, investable           | May not match strategy                |
| Peer Group      | Compares similar strategies | Survivorship bias, varying strategies |

### Related Terms

<CardGroup cols={3}>
  <Card title="Alpha" href="/glossary/alpha">
    Excess return vs. benchmark
  </Card>

  <Card title="Tracking Error" href="/glossary/tracking-error">
    Deviation from benchmark
  </Card>

  <Card title="Information Ratio" href="/glossary/information-ratio">
    Risk-adjusted benchmark beating
  </Card>
</CardGroup>