f/overrides/event-backup/admzx-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

2.3 KiB

1DateDividendsctime
22016-12-050.0330002021-12-20 11:20:16
32016-12-050.1082017-08-22
42016-12-060.02017-08-22
52017-12-050.0000002021-12-20 11:20:16
62017-12-050.2592017-12-11 20:07:47
72018-12-070.7712022-03-10 12:28:16
82018-12-070.0000002022-01-02 19:32:04
92018-12-070.7712021-12-27 08:45:46
102018-12-070.0000002021-12-20 11:20:16
112018-12-070.02021-10-23 20:14:09
122018-12-070.7712021-08-22 11:35:58
132018-12-070.02021-03-01 22:16:32
142018-12-070.7712018-12-20 11:23:51
152016-12-050.1082018-12-20 11:23:51
162016-12-060.02018-12-20 11:23:51
172017-12-050.2592018-12-20 11:23:51
182019-12-090.0110002021-12-20 11:20:16
192019-12-090.412020-01-10 20:00:07
202019-12-090.3992019-12-19 07:25:20
212020-12-100.4372022-03-10 12:28:16
222016-12-050.1082022-04-04 08:46:35
232016-12-060.02022-04-04 08:46:35
242017-12-050.2592022-04-04 08:46:35
252019-12-090.412022-04-04 08:46:35
262020-12-100.0000002022-01-02 19:32:04
272016-12-050.1082022-03-10 12:28:16
282016-12-060.02022-03-10 12:28:16
292017-12-050.2592022-03-10 12:28:16
302019-12-090.412022-03-10 12:28:16
312020-12-100.4372021-12-27 08:45:46
322020-12-100.0000002021-12-20 11:20:16
332016-12-050.1082021-12-27 08:45:46
342016-12-060.02021-12-27 08:45:46
352017-12-050.2592021-12-27 08:45:46
362019-12-090.412021-12-27 08:45:46
372020-12-100.02021-10-23 20:14:09
382020-12-100.4372021-08-22 11:35:58
392016-12-050.0332021-10-23 20:14:09
402016-12-050.1082021-08-23 19:55:00
412016-12-060.02021-08-23 19:55:00
422017-12-050.02021-10-23 20:14:09
432017-12-050.2592021-08-23 19:55:00
442019-12-090.0112021-10-23 20:14:09
452019-12-090.412021-08-23 19:55:00
462020-12-100.02021-03-01 22:16:32
472016-12-050.1082021-08-22 11:35:58
482016-12-050.0332021-04-07 15:12:50
492016-12-060.02021-08-22 11:35:58
502017-12-050.2592021-08-22 11:35:58
512017-12-050.02021-04-07 15:12:50
522019-12-090.412021-08-22 11:35:58
532019-12-090.0112021-04-07 15:12:50
542020-12-100.4372020-12-17 10:32:49
552016-12-050.0332021-03-01 22:16:32
562016-12-050.1082020-12-17 10:32:49
572016-12-060.02020-12-17 10:32:49
582017-12-050.02021-03-01 22:16:32
592017-12-050.2592020-12-17 10:32:49
602019-12-090.0112021-03-01 22:16:32
612019-12-090.412020-12-17 10:32:49
622021-12-090.0000002022-03-10 08:33:27