A Limit-Up and Bollinger Band Screen for Chinese Stocks

Summary

This post describes a proposed Chinese stock screen combining recent limit-up frequency with Bollinger Band levels. It seeks stocks with at least two limit-up sessions in the past ten days and uses the close relative to the bands, then suggests adding market capitalization, price-to-earnings, and price-to-book filters. The rationale is that repeated limit-ups may signal short-term strength, while Bollinger positions may indicate trend conditions.

The post provides no backtest results or performance evidence. Its criteria are internally inconsistent: it describes the close as between the upper and middle bands, above the upper band, and below the middle band. The sample code also appears inconsistent with the stated intent and does not clearly calculate limit-up counts. The author flags inaccurate band calculations, misclassified limit-ups, and sharp price moves as risks, and suggests testing alternate band methods and additional fundamental filters. Treat this as an illustrative, underspecified screening idea rather than a validated strategy.

Key ideas

• The proposed screen combines Bollinger Band conditions with repeated recent limit-up sessions.
• The post suggests adding size and valuation filters to refine the stock universe.
• Its written price conditions conflict with one another, making the intended rule unclear.
• No performance evidence is reported, and the sample implementation has apparent logic gaps.

Tags

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