A Chinese Microcap Strategy with Exchange and Liquidity Filters

Summary

This BigQuant assignment submission describes a stock strategy with two adjustable parameters and a target of holding 50 stocks. The author says the implementation adds filters for non-ST stocks, non-suspended shares, and excludes Beijing Stock Exchange listings. The stated observation is that removing those listings reduced the reported Sharpe ratio from 2.15 to 1.69; the author connects this change to the possible inaccessibility of some microcaps for many investors.

The post does not explain the underlying signal, sample period, benchmark, transaction costs, or how the Sharpe ratio was calculated, so the comparison cannot establish whether the strategy is robust or tradable. It also asks why the final three parameter values trigger memory errors, without providing an answer or enough code to diagnose the issue. The shared strategy references are mentioned in the source, but the post itself mainly offers implementation notes, one reported backtest comparison, and an unresolved technical question.

Key ideas

• The submission makes two strategy parameters adjustable and describes a 50-stock portfolio.
• It adds filters for ST status, trading suspension, and Beijing Stock Exchange listings.
• The author reports a Sharpe ratio decline from 2.15 to 1.69 after excluding Beijing Stock Exchange stocks.
• The post attributes the difference tentatively to microcap accessibility.
• It gives no test methodology or costs and leaves a memory-error question unresolved.

Tags

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