f/overrides/event-backup/ihe-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

1.6 KiB

1DateDividends
22020-03-250.195667
32021-09-240.277333
42022-06-090.239000
52006-12-200.040667
62012-09-250.220667
72015-03-250.085000
82017-03-240.119333
92018-12-170.117000
102023-12-200.134667
112026-03-170.284000
122018-06-260.163000
132022-12-130.445667
142024-03-210.275000
152009-12-230.065667
162012-06-190.103000
172013-03-250.100000
182014-06-240.253000
192016-12-210.112667
202013-06-260.108667
212018-09-260.132000
222019-06-170.178333
232020-09-230.236333
242025-12-160.585000
252016-06-210.111333
262019-03-200.185667
272024-09-250.359000
282007-03-230.050333
292007-12-270.040000
302011-09-230.084000
312011-12-220.072333
322012-03-260.100000
332018-03-220.176667
342023-03-230.224000
352024-06-110.294000
362008-03-250.060333
372011-03-250.069000
382013-12-270.021000
392025-03-180.292000
402021-06-100.240333
412025-06-160.307000
422010-09-230.073333
432013-12-230.091667
442015-09-250.127000
452016-03-230.102667
462019-09-240.210000
472006-09-260.031667
482007-09-250.050667
492008-12-230.060667
502010-06-240.074000
512016-09-260.105333
522017-09-260.150000
532015-06-240.129333
542017-06-270.306000
552017-12-190.124000
562022-09-260.295000
572024-12-170.211000
582010-12-220.086000
592014-09-240.131333
602019-12-160.171667
612023-06-070.196667
622023-09-260.300667
632008-09-240.093667
642020-12-140.175333
652021-03-250.211667
662022-03-240.264667
672025-09-160.312000
682009-03-250.077333
692011-06-240.075333
702012-12-190.134333
712009-06-240.069333
722009-09-220.052000
732010-03-250.063333
742020-06-150.104667
752026-06-150.285000
762014-12-240.128667
772015-12-240.696667
782021-12-130.263333
792006-06-220.036667
802007-06-280.043333
812008-06-250.032667
822013-09-240.096667
832014-03-250.093000