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Why yfinance Fails to Fetch Natural Gas Futures Data and How to Fix It

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Developers using the yfinance Python library have reported recurring failures when downloading natural gas futures data via the NG=F ticker on Yahoo Finance. The issue stems from yfinance being an unofficial scraping tool, meaning any backend change by Yahoo can silently break data retrieval without warning. Futures symbols like NG=F are especially prone to these disruptions, with multiple known issues logged by the community over the years. Three short-term fixes include upgrading the library, adding retry logic with backoff, and switching between yf.download() and yf.Ticker().history() methods. For production pipelines requiring reliable data, the author recommends migrating to a dedicated natural gas price API rather than depending on an unsupported scraping workaround.

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