Delisted Stocks Can Disrupt Simulated Trading

Summary

This short support discussion concerns a simulated trading run that reportedly failed or stopped before reaching its intended endpoint, even though the available logs showed no clear error. Replies suggest two different observations: one participant saw a backtest complete, while another noted that it stopped on a particular date. A further reply points to the portfolio holding a delisted stock and argues that the universe should filter such securities.

The exchange offers a practical warning for equity strategy research: a backtest or paper trading system needs rules for securities that become untradeable, including delisted names. It does not establish that the delisted holding caused the reported failure, nor does it provide a diagnosis, reproducible configuration, code, or tested remedy. The discussion is brief and anecdotal, so it is best treated as a prompt to inspect instrument eligibility and simulation logs rather than as a technical fix.

Key ideas

• The discussion reports a simulated run that stopped despite logs showing no obvious error.
• Participants disagree about whether the backtest completed or stopped early.
• A reply identifies a delisted holding as a possible issue and recommends filtering such stocks.
• The thread does not verify the cause or provide a reproducible solution.

Tags

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