Northbound Exchange Profit-Growth Data Quality Discrepancy

Summary

This forum post flags a data-quality concern in the net profit year-over-year growth field for Beijing Stock Exchange listings. The author reports substantial differences between the values from two named market-data sources and shows many securities with a reported value of negative one. The repeated rows suggest the issue affects multiple tickers rather than a single observation.

The post is a warning about validating fundamental data before using it in screening, factor construction, or backtests. It does not explain the field’s definition, why the negative-one values appear, which source is more accurate, or how to correct or reconcile the records. No dates, methodology, or independent checks are provided beyond the examples, so readers should treat the report as an unresolved discrepancy rather than evidence that one provider’s data are definitively wrong. The material offers no investment strategy or measured trading results.

Key ideas

• The post reports differences in year-over-year net profit growth data across market-data providers for Beijing Stock Exchange stocks.
• Many listed examples show a value of negative one in the questioned field.
• Fundamental data should be checked for anomalous values before factor analysis or backtesting.
• The post does not establish the cause of the discrepancy or identify a verified correction.

Tags

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