# `sector_etf_data.xlsx`

Weekly prices and total/excess returns for the GICS sector SPDR ETFs (XLK, XLI, XLF, ...).

| | |
|---|---|
| **Source** | **Yahoo** — Yahoo Finance |
| **Years** | 2000-2026 |
| **Frequency** | W |
| **Vintage** | Rolling — refreshed by re-running the builder |
| **Rebuild** | `build_data/Build Yahoo - Sector ETFs.ipynb` |

## Used in this book

- [LFD for Dimension Reduction](../discussions/LFD%20for%20Dimension%20Reduction.ipynb) — Linear Factor Decomposition (Discussion)

## Files in this book

- `sector_etf_data.xlsx`