Greg Pomerantz
e20b2e30cb
Yahoo changed the shape of its event feed between downloads: a 2026-08
re-download of CVIX/JLPSX shows it no longer returns capitalGain events at
all (the dividend stream still carries the year-end rows), while stale
tickers now return no events at all. File-specific remove ops therefore
break silently on the next re-download, so the double-listing fix is now
expressed as layout-agnostic invariants applied at bundle assembly
(idempotent, hold for full and incremental builds):
dedup: [[date, amount]] keep at most one copy of a same-date/
same-amount cross-file pair (the capitalGain copy when both present)
drop_capg_copy: [date] the capitalGain row on that date is the
spurious copy of the dividend row
- data.py: apply_invariants() at bundle assembly + pure dedupe_event_rows()
shared with verify_official and tests (8 new test cases, 22 passing)
- JLPSX/CVSIX corrections rewritten with the invariants (2019-08-08 now
keeps the dividend amount per the verified same-date pattern)
- scripts/scan_double_listing.py: whole-dump sweep -> reports/double_listing/
6,421 symbols scanned: 1,218 with same-amount pairs (6,589), 1,631 with
differing-amount pairs (12,366, reported only - not distinguishable from
legitimate same-day div+capg without per-fund official data), 83 with
repeated within-file rows (ingest keep-last already collapses them)
- scripts/apply_dedup_corrections.py: bulk 'dedup' corrections for the
1,218 same-amount symbols (1,212 new files; the 6 verified funds keep
their explicit, official-verified corrections)
- scripts/check_corrections.py: integrity check for every correction op
against the actual (frozen) files - caught a mis-filed CVSIX entry
104 lines
1.5 KiB
JSON
104 lines
1.5 KiB
JSON
{
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"symbol": "cvsix",
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"name": "Calamos Market Neutral Income A",
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"verdict": "ok",
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"class": "?",
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"mean_rel_err": 0.0384,
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"nav_check": {
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"date": "2021-10-29",
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"official": 14.63,
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"local": 14.63,
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"rel": 0.0,
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"ok": true
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},
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"periods": [
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{
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"period": "current",
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"end": "2026-04-30",
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"official": 0.16,
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"local": 0.159,
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"diff": 0.001,
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"ok": true,
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"unbounded": false
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},
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{
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"period": "fy",
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"end": "2025-10-31",
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"official": 0.25,
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"local": 0.252,
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"diff": -0.002,
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"ok": true,
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"unbounded": false
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},
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{
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"period": "fy",
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"end": "2024-10-31",
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"official": 0.79,
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"local": 0.792,
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"diff": -0.002,
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"ok": true,
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"unbounded": false
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},
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{
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"period": "fy",
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"end": "2023-10-31",
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"official": 0.2,
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"local": 0.198,
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"diff": 0.002,
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"ok": true,
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"unbounded": false
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},
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{
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"period": "fy",
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"end": "2022-10-31",
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"official": 0.03,
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"local": 0.026,
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"diff": 0.004,
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"ok": true,
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"unbounded": false
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},
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{
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"period": "fy",
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"end": "2021-10-31",
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"official": 0.06,
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"local": 16.306,
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"diff": -16.246,
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"ok": false,
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"unbounded": true
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}
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],
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"other_classes": [
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"?",
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"?",
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"?",
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"?",
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"?",
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"?",
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"?",
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"?",
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"?",
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"?",
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"?",
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"?",
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"?",
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"?",
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"?",
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"?",
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"?",
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"?",
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"?",
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"?"
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],
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"filing": {
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"accession": "0001104659-26-080185",
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"doc": "tm2618831d1_ncsrs.htm",
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"period_end": "2026-04-30",
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"display": "CALAMOS INVESTMENT TRUST/IL (CIK 0000826732)",
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"ciks": [
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"0000826732"
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],
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"score": 19.313068
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},
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"how": "ticker",
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"n_bytes": 25711754
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} |