f/overrides/event-backup/bdcz-dividend.csv
Greg Pomerantz bb8e39605e Event-history protection: backup dir, empty-download fallback, docs
Yahoo's 2026 event-feed change (capitalGain events dropped for some
funds; no events at all for terminated tickers) can wipe good event
history on re-download. Defense in depth:

- overrides/event-backup/: last-known-good copy of every dividend/
  capitalGain file (8,192 files, 58 MB); refresh with
  scripts/backup_events.py after each dump update
- data.py event_file(): frozen > data-root (while populated) > backup;
  used by panel reads, verify_official, and the double-listing scanner
- README: capital-gain files are mutual-fund-only in this dump; Yahoo
  has no LT/ST split (tax.py taxes capg at lt_rate; the per-fund split
  would come from fund-company annual tax statements or commercial feeds)
- tests: exact Timestamp .loc keys (pandas 3.x string matching returns a
  Series on large DatetimeIndex)
2026-08-31 21:59:25 -04:00

875 B

1DateDividends
22021-04-120.379000
32016-04-080.453000
42016-07-120.453000
52017-10-120.455000
62018-10-110.417000
72019-01-110.454000
82018-04-120.421000
92019-10-100.414000
102020-10-090.377000
112025-04-110.581000
122025-07-140.444000
132016-01-110.457000
142017-01-110.445000
152017-07-120.483000
162021-10-120.381000
172024-10-110.450000
182026-01-130.320000
192026-04-130.453000
202026-07-140.532000
212018-07-130.426000
222019-04-110.417000
232023-01-120.427000
242023-04-120.432000
252025-10-100.446000
262020-04-090.447000
272020-07-130.366000
282022-10-120.405000
292022-07-130.411000
302023-07-130.429000
312024-01-120.440000
322024-04-110.460000
332025-01-130.323000
342024-07-150.446000
352016-10-110.435000
362017-04-100.442000
372019-07-120.429000
382022-01-110.378000
392023-10-120.444000
402018-01-120.447000
412020-01-100.434000
422021-01-120.371000
432021-07-130.371000
442022-04-110.377000