Audit turbulence proxy coverage and adjusted-close provenance

Objective

Audit turbulence proxy coverage and adjusted-close provenance.

Notes: Recorded per-ticker Yahoo cache metadata, fixed-window coverage, and canonical adjusted-close SHA-256 digests in a derived-only artifact. VNQI inception fixes the 2010-11-01 common start; all 3,954 VNQI sessions are present across the other seven inputs. Documented auto_adjust provenance and its vendor-revision/corporate-action limitations; this does not revisit t354 rejection.

Approach

[reconstructed — uncertain] No dedicated findings Markdown located for t355. Summary reconstructed from research/findings/task-history.json entry and git history. Uncertain fields: detailed approach, exact file list, and metrics beyond the task note.

Files / code / data changed

• No commit SHA confidently associated with t355 in sampled log [reconstructed — uncertain].
• Task-history entry: research/findings/task-history.json#t355

Results

Task note: Recorded per-ticker Yahoo cache metadata, fixed-window coverage, and canonical adjusted-close SHA-256 digests in a derived-only artifact. VNQI inception fixes the 2010-11-01 common start; all 3,954 VNQI sessions are present across the other seven inputs. Documented auto_adjust provenance and its vendor-revision/corporate-action limitations; this does not revisit t354 rejection. [reconstructed — uncertain] No quantitative tables recovered for this entry; see git diff and task-history for grounds.

Conclusions

[reconstructed — uncertain] Outcome inferred from status done and task note.

Problems / follow-ups

• See source report or PR discussion for follow-ups. No unsupported follow-ups fabricated.

Links

• Task-history: research/findings/task-history.json id t355