QuantConnect Lean version 18200 fixes market session boundary issues
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QuantConnect has released QuantConnect Lean version 18200, fixing boundary anomalies in the GetMarketHours function related to early close and delayed open scenarios. This version resolves the issue where the function incorrectly returned the full regular trading session when the delayed open time was later than all trading sessions on the same day, and also eliminates the problem of zero-length trading sessions being generated at boundary time points. This fix was jointly developed by abhi-byte62 and Claude Opus 5.5, and regression tests for the corresponding scenarios have been added in this version.
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- QuantConnect Lean：GitHub ReleasesQuantConnect Lean Version 18200 Fixes GetMarketHours Boundary Issues for Early Close and Delayed Open
QuantConnect Lean Version 18200 fixes boundary anomalies in the GetMarketHours function for early close and delayed open scenarios. It resolves the error where a delayed open later than all trading sessions on the same day incorrectly returned the full regular trading session, while also eliminating zero-length trading sessions caused by boundary time points. This version adds regression tests for corresponding scenarios, developed jointly by abhi-byte62 and Claude Opus 5.5.
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