Using Patent Data to Enhance Chinese Technology Stock Indices

Summary

This research reviews technology-focused equity indices in China, comparing their historical performance, construction rules, and constituent distributions. It then examines whether patent information can improve index selection. The proposed patent measures include counts by patent category and a measure of technological links between companies; the report says both showed stock-selection ability within the technology sector. Adding granted invention patents to existing technology indices is presented as a way to select firms with both research investment and more substantial research outputs.

The report describes an index called EBTech100, combining quality, growth, research-spending share, and patent information. Its summary reports that patent additions improved the returns of two existing indices in tests covering a stated historical period, while EBTech100 showed stronger or comparable returns across different market phases. These findings are the authors’ reported backtest results, not independent validation. The document excerpt does not provide detailed methodology, costs, turnover, or evidence about performance after publication, so the reported advantages should be read with those limits in mind.

Key ideas

• The report compares Chinese technology indices by performance, construction, and constituent composition.
• Patent counts and intercompany technology relationships are proposed as stock-selection signals.
• Granted invention patent information is combined with other factors to construct a technology index.
• The reported performance improvements come from historical tests, whose detailed assumptions are absent from the excerpt.

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