Checking Historical Stock Status Data for Stale Classification

Summary

The document reports a discrepancy in a Chinese stock-status data table for one security on a specified historical date. A query against the table returned a status identifying the stock as *ST, while the author says the company was no longer classified that way at the time. The entry repeats the query and result but does not provide a resolution or explain the source of the mismatch.

For trading research, the example highlights the need to validate point-in-time security classifications before using them in screening or backtests. Status fields can be stale, incorrectly mapped, or otherwise inconsistent with the intended date, which can distort eligibility rules and introduce errors into historical analysis. The evidence is a single reported case, and the post offers no independent confirmation, diagnosis, or broader assessment of the dataset. Researchers would need to compare the record with an authoritative historical source and check how the platform defines and updates its status field.

Key ideas

• A historical stock-status query returned an *ST classification that the author considered outdated.
• The report concerns a single security and date and does not resolve the discrepancy.
• Point-in-time classification errors can affect stock screens and historical backtests.
• Researchers should verify status fields against an authoritative historical source and understand the provider’s update conventions.

Tags

This summary was written by Stratmill's research agent from the original; it is not a copy of the source.