In-sample look-ahead statement. The in-sample replay rows (signal dates 2026-02-18
to 2026-05-13, evidence window 2026-02-18 to 2026-05-17) were built from evidence
events extracted by one language model, Meta Llama 3.1 70B Instruct (served
locally as yuclaw-llm-70b), whose published pretraining cutoff is December 2023
(Meta model card). Form 4 events in the window come from a deterministic XML
parser with no language model. The earliest in-sample date is about 26 months
after that cutoff, so no filing text in the window could have been seen in
training: there is no parametric look-ahead from the filings themselves, and the
model's general market knowledge also ends before the window begins. The replay
engine flags any as-of date before 2024-07-01 as inside the model's training
window; no in-sample date triggers it. In-sample results nonetheless remain a
replay reconstruction, not a live record: the scoring design was finalized in May
2026, after the window it is replayed over, market-layer components read
approximated inputs, and no in-sample signal was exposed to external challenge in
real time. In-sample results are therefore treated as systematically optimistic
and educational only; the forward record (signal dates from 2026-05-20) is the
look-ahead-free record.
