Screening 2021 IPOs by Turnover and Recent Limit-Up Activity

Summary

This Chinese stock-screening post selects companies listed in 2021 whose turnover rate is between 3% and 12% and that had at least one limit-up session within the prior 25 days. It presents the turnover band as a way to avoid the risks of unusually active trading, while the prior limit-up condition is intended to identify stocks with stronger recent market performance. The post includes formula and Python examples, although their implementations do not perfectly align: the formula appears to check a prior-day condition, and the Python example scans a 25-session price window for a specified daily rise.

The source provides no backtest results or evidence that the filters predict future returns. It warns that a short historical window can miss opportunities, that the screen ignores company fundamentals and broader market conditions, and that technical criteria alone may be unreliable. It suggests widening the observation period and combining technical filters with fundamental measures. As written, the rule is a screening hypothesis with limited validation, and its turnover and limit-up definitions should be checked against the intended data source before use.

Key ideas

• The screen selects stocks listed in 2021 with turnover between 3% and 12%.
• It also requires at least one limit-up event during a recent 25-day window.
• The post offers formula and Python examples whose time-window conditions may not match exactly.
• No backtest or performance evidence is provided for the proposed filters.
• The author notes risks from a short lookback and missing fundamental or market-wide factors.

Tags

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