yfinance

You can fetch Yahoo Finance market data without an API key by using a unified DataLoader that retrieves and normalizes OHLCV, financials, and institutional holdings for global markets. It requires no authentication, making it suitable for lightweight research and backtesting.

Yes, you can pull OHLCV data for both US and HK stocks using a single interface. The system handles automatic ticker-format conversion, allowing you to retrieve data across global markets, including ETFs and indices, through one unified data loading process.

The best way to get institutional holdings and insider transactions for backtesting is to use a free data loader that normalizes Yahoo Finance data. It retrieves these specific financial metrics alongside OHLCV data, requiring no API key, which simplifies historical research and analysis.

Yes, this Yahoo Finance data loader works with ETFs and global indices. It is explicitly designed for unified data loading across US stocks, HK stocks, ETFs, and indices, automatically handling ticker-format conversion to normalize the retrieved market data.

You need to convert ticker formats when downloading global market data because different international markets use distinct ticker conventions. Automatic ticker-format conversion ensures a unified interface, allowing seamless retrieval of OHLCV and financials across US stocks, HK stocks, and ETFs.

Limitations of using free Yahoo Finance data for research include potential restrictions on data volume or real-time latency compared to paid alternatives. However, it effectively handles format conversion and load options for historical OHLCV and financials without authentication, suitable for lightweight pulls.