f/overrides/event-backup/bizd-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

1.1 KiB

1DateDividends
22019-12-300.366000
32020-04-010.356000
42022-12-280.423000
52015-12-290.398000
62016-04-010.410000
72016-10-030.352000
82020-07-010.385000
92026-04-010.482000
102015-07-010.380000
112019-07-010.386000
122021-04-010.371000
132022-10-030.410000
142019-04-010.410000
152021-07-010.318000
162021-12-290.361000
172026-07-010.239000
182013-07-010.250000
192018-07-020.350000
202023-10-020.437000
212022-04-010.347000
222025-10-010.401000
232017-04-030.347000
242017-07-030.370000
252018-04-020.383000
262023-07-030.419000
272024-07-010.453000
282013-04-010.207000
292016-07-010.406000
302017-10-020.374000
312023-04-030.435000
322024-10-010.463000
332025-07-010.439000
342020-12-290.325000
352013-10-010.330000
362025-04-010.430000
372014-07-010.340000
382019-10-010.367000
392023-12-270.468000
402024-04-010.458000
412014-04-010.340000
422014-10-010.415000
432014-12-290.431000
442018-12-270.407000
452013-12-270.356000
462015-04-010.330000
472015-10-010.330000
482017-12-270.425000
492020-10-010.360000
502025-12-290.402000
512022-07-010.407000
522021-10-010.351000
532018-10-010.388000
542016-12-280.365000
552024-12-270.445000