Yijia-Xiao 0c1231a405 fix(data): keep future/undated news out of historical windows ...

The yfinance news date filter only ran when an article had a parsed date, so
flat-format and undated articles bypassed it and leaked future news into
historical/backtest runs. Parse the flat providerPublishTime, apply one
look-ahead-safe window rule across ticker and global news (undated kept only
when the window reaches the present), and return an informative message when
everything is filtered out.

2026-06-13 21:54:07 +00:00

3.0 KiB

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