yfinance
Download market data from Yahoo! Finance API
Decision gist · record as of 2026-08-14
Yes, if your use case is research or personal analysis. yfinance is widely used, actively maintained, and has low install friction. However, do not use it for commercial applications or high-volume data collection without confirming compliance with Yahoo's terms of service. The Apache-2.0 license is permissive, but Yahoo's data restrictions are separate and binding.AI-flagged interpretation of the facts on this page — verify before relying
Before you install
- Yahoo Finance API is intended for personal use only; commercial or high-volume use may violate Yahoo's terms of service.
- Low friction install with a pure-Python wheel and 12 runtime dependencies.
- Actively maintained with a recent release and 24986 repository stars.
License · maintenance · safety
Apache-2.0 (permissive) — Apache-2.0 permissive license allows commercial and private use with minimal restrictions. Note that yfinance itself is not affiliated with Yahoo, Inc., and you must comply with Yahoo's terms of use for the data you download.
last release 2026-08-13 (1 days) · last repo commit 2026-08-13 · 24,986 stars
0 known vulnerabilities (OSV.dev, 2026-08-14) · 29,190,204 downloads/mo, #823 on PyPI
Alternatives
Verify before relying
pip install yfinance
import yfinance as yf
data = yf.download('AAPL')- Whether the 12 runtime dependencies are all actively maintained and free of known vulnerabilities.
- Current rate limits or throttling policies enforced by Yahoo Finance on API requests.
- Whether live streaming via WebSocket and AsyncWebSocket is stable and fully documented.
- Specific date range parameters and filtering options supported by the download function.
What it is and what it does
yfinance is a Python wrapper around Yahoo Finance's publicly available APIs that lets you download historical and real-time market data without needing to write raw HTTP requests. It handles the details of authentication, parsing, and data formatting, returning results as pandas DataFrames or other standard Python objects. The package includes components for single and multiple ticker lookups, historical downloads, live streaming, market searches, and sector/industry information.
The library is designed for research and educational use. It depends on pandas, numpy, requests, beautifulsoup4, and several other libraries for HTTP, parsing, and data handling. While installation is straightforward and the project is actively maintained, you should be aware that yfinance is not affiliated with Yahoo and that Yahoo's terms of service restrict the data to personal use only.
Use it for
- Backtest trading strategies by downloading historical OHLC data for multiple tickers.
- Build a portfolio tracker that pulls current prices and market data into a pandas DataFrame.
- Research sector and industry performance by querying market information and screening equities.
- Stream live market quotes and price updates using WebSocket for real-time monitoring.
- Fetch fundamental data and news for a set of stocks to support investment analysis.
Worth the install?
AI-flagged interpretation of the facts on this page. Verify before relying on it.
Yes, if your use case is research or personal analysis.
yfinance is widely used, actively maintained, and has low install friction. However, do not use it for commercial applications or high-volume data collection without confirming compliance with Yahoo's terms of service. The Apache-2.0 license is permissive, but Yahoo's data restrictions are separate and binding.
Install
yfinance on PyPI
Before you install
Low friction install with a pure-Python wheel and 12 runtime dependencies. Actively maintained with a recent release and 24986 repository stars.
Yahoo Finance API is intended for personal use only; commercial or high-volume use may violate Yahoo's terms of service.
License in practice
Apache-2.0 permissive license allows commercial and private use with minimal restrictions. Note that yfinance itself is not affiliated with Yahoo, Inc., and you must comply with Yahoo's terms of use for the data you download.
Quickstart
pip install yfinance
import yfinance as yf
data = yf.download('AAPL')Verify before relying
- Whether the 12 runtime dependencies are all actively maintained and free of known vulnerabilities.
- Current rate limits or throttling policies enforced by Yahoo Finance on API requests.
- Whether live streaming via WebSocket and AsyncWebSocket is stable and fully documented.
- Specific date range parameters and filtering options supported by the download function.
Package facts
| License | Apache-2.0 permissive |
| Python support | Not specified |
| Install friction | Low. Pure-Python wheel |
| Runtime dependencies | 12 packagesbeautifulsoup4curl_cffilxmlmultitaskingnumpypandaspeeweeplatformdirsprotobufpytzrequestswebsockets |
| Maintenance | Actively maintained 1 days since the last release |
| Last repo commit | |
| First released | |
| Downloads | 29,190,204 / month, #823 on PyPI 30-day window, as of 2026-08-14 |
| Known vulnerabilities | None known OSV.dev, checked 2026-08-14 |
| Classifiers | Development Status :: 4 - BetaIntended Audience :: DevelopersLicense :: OSI Approved :: Apache Software LicenseOperating System :: OS IndependentProgramming Language :: Python :: 3.10Programming Language :: Python :: 3.11Programming Language :: Python :: 3.12Programming Language :: Python :: 3.13Programming Language :: Python :: 3.6Programming Language :: Python :: 3.7Programming Language :: Python :: 3.8Programming Language :: Python :: 3.9Topic :: Office/Business :: FinancialTopic :: Office/Business :: Financial :: InvestmentTopic :: Scientific/Engineering :: Interface Engine/Protocol TranslatorTopic :: Software Development :: LibrariesTopic :: Software Development :: Libraries :: Python Modules |
Evidence: yfinance-1.6.0-py3-none-any.whl
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