f/reports/xcheck_official/vtsax.json
Greg Pomerantz 6536c9903e Tier-3 verification: cross-check distributions against SEC filings
scripts/verify_official.py locates each fund's latest N-CSR/N-CSRS/10-K/10-Q
via EDGAR full-text search (full fund-name phrase first, then ticker +
name words, then bare ticker), extracts the fund's Financial Highlights
tables (both Vanguard-style and Victory-style layouts, calendar and
non-calendar fiscal years, M/D/YY and month-name headers), matches the
share class by per-share distribution series + NAV magnitude, and
compares per period window against the local Yahoo CSVs (frozen copies
for stale tickers). Per-symbol JSONs + SUMMARY.md land in
reports/xcheck_official/; results are cached per fund.

Run on the 29 curated funds: 8 ok (exact to 3dp, e.g. VTSAX 2021-2026H1),
1 mismatch (CVSIX FY2009: local 1.104 vs official 0.81 - the Yahoo
2008-12-18 row of 0.292 looks spurious), 3 weak-match (uncovered doc
formats, e.g. Leuthold), 17 not-found (mostly ETF families whose
10-K layouts aren't covered yet).
2026-08-31 14:41:03 -04:00

89 lines
1.5 KiB
JSON

{
"symbol": "vtsax",
"name": "Vanguard MStar Total Stk Mkt Idx Admiral",
"filing": {
"accession": "0001104659-26-102230",
"doc": "tm2620528d1_ncsrs.htm",
"period_end": "2026-06-30",
"display": "VANGUARD INDEX FUNDS (CIK 0000036405)",
"ciks": [
"0000036405"
],
"score": 2.8299427
},
"how": "ticker",
"n_bytes": 23721562,
"verdict": "ok",
"class": "Admiral Shares",
"mean_rel_err": 0.0,
"nav_check": {
"date": "2021-12-31",
"official": 117.56,
"local": 117.559998,
"rel": 0.0,
"ok": true
},
"periods": [
{
"period": "current",
"end": "2026-06-30",
"official": 0.985,
"local": 0.985,
"diff": 0.0,
"ok": true,
"unbounded": false
},
{
"period": "fy",
"end": "2025-12-31",
"official": 1.814,
"local": 1.814,
"diff": 0.0,
"ok": true,
"unbounded": false
},
{
"period": "fy",
"end": "2024-12-31",
"official": 1.776,
"local": 1.776,
"diff": 0.0,
"ok": true,
"unbounded": false
},
{
"period": "fy",
"end": "2023-12-31",
"official": 1.651,
"local": 1.651,
"diff": 0.0,
"ok": true,
"unbounded": false
},
{
"period": "fy",
"end": "2022-12-31",
"official": 1.54,
"local": 1.54,
"diff": 0.0,
"ok": true,
"unbounded": false
},
{
"period": "fy",
"end": "2021-12-31",
"official": 1.415,
"local": 16.974,
"diff": -15.559,
"ok": false,
"unbounded": true
}
],
"other_classes": [
"Investor Shares",
"ETF Shares",
"Institutional Shares",
"Institutional Plus Shares",
"Institutional Select Shares"
]
}