f/overrides/event-backup/idv-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

1.5 KiB

1DateDividends
22009-03-240.080000
32021-12-130.302000
42024-12-170.380000
52025-06-160.787000
62026-03-170.201000
72025-03-180.188000
82007-12-240.382000
92009-06-220.416000
102012-09-240.452000
112014-09-240.298000
122015-06-240.530000
132016-03-230.340000
142016-06-210.543000
152010-09-220.364000
162020-09-230.302000
172024-09-250.424000
182021-03-250.461000
192026-06-151.102000
202009-12-210.322000
212010-03-240.232000
222012-06-200.722000
232013-03-220.272000
242014-12-190.456000
252019-06-170.723000
262019-12-160.383000
272020-03-250.799000
282008-06-250.982000
292011-03-240.245000
302011-09-220.396000
312011-12-190.250000
322013-06-250.841000
332018-06-190.611000
342019-03-200.344000
352020-12-140.214000
362022-09-260.610000
372008-12-220.443000
382017-06-200.568000
392021-09-240.612000
402013-12-170.184000
412012-12-140.202000
422021-06-100.428000
432022-03-240.365000
442022-12-130.368000
452012-03-230.253000
462013-09-300.402000
472015-09-250.301000
482015-12-210.404000
492023-12-200.373000
502017-12-210.378000
512020-06-150.297000
522024-03-210.236000
532025-09-160.382000
542007-09-250.663000
552014-03-250.406000
562016-12-220.166000
572017-03-240.323000
582023-06-070.727000
592011-06-210.733000
602014-06-240.872000
612023-09-260.508000
622010-12-200.208000
632018-09-260.324000
642018-12-180.468000
652019-09-240.279000
662023-03-230.214000
672008-03-260.888000
682008-09-220.505000
692009-09-210.242000
702017-09-260.261000
712018-03-220.300000
722022-06-090.649000
732025-12-150.592000
742010-06-210.513000
752015-03-250.223000
762016-09-260.339000
772024-06-110.728000