Learning library
Why analysis dates and data boundaries matter
How a visible time boundary protects historical research from quietly using future information.
TradingAgents Report editorial team ·
A date is part of the research question
An analysis date tells the system which evidence could have been known at that point. It changes the meaning of a valuation, a news event and even a technical chart. Without it, a historical report can accidentally borrow information from the future.
Look-ahead bias is usually quiet
A report does not need an obvious error to be biased. Later financial statements, revised data, late-published articles and current prices can all make an old conclusion look more informed than it was.
TradingAgents documents date filtering for prices, fundamentals and news. That boundary is a safeguard, not proof that every data source is complete or timely. Some sentiment or prediction-market inputs may still reflect live-at-run data rather than a historical as-of snapshot.
Missing data is a result
A provider outage, unavailable field or rate limit should remain visible as missing evidence. Filling the gap with invented values would make a report look more complete while making it less reliable.
What to check before comparing reports
Compare reports only after checking the analysis date, instrument identity, enabled analyst modules, and quick/deep model configuration. Two reports about the same company may answer different time-bounded questions.