f/overrides/event-backup/miazx-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
22021-12-310.105000
32025-06-300.049000
42025-11-280.050000
52020-12-310.084000
62024-02-290.047000
72024-08-300.051000
82026-01-300.050000
92020-02-280.030000
102021-06-300.030000
112022-08-310.040000
122022-11-300.043000
132021-10-290.033000
142022-09-300.040000
152023-12-290.051000
162025-04-300.051000
172025-09-300.050000
182026-05-290.049000
192026-06-300.049000
202021-11-300.033000
212022-02-280.030000
222022-03-310.029000
232023-06-300.047000
242022-12-300.044000
252023-04-280.046000
262024-03-280.050000
272024-12-310.057000
282020-03-110.129000
292021-02-260.033000
302021-09-300.031000
312022-07-290.037000
322025-01-310.050000
332026-02-270.046000
342020-05-290.039000
352024-06-280.050000
362024-09-300.049000
372025-10-310.052000
382024-04-300.049000
392024-05-310.051000
402026-03-310.052000
412020-03-310.037000
422021-01-290.037000
432021-05-280.033000
442021-07-300.033000
452023-09-290.048000
462023-11-300.050000
472025-08-290.051000
482025-12-310.051000
492020-04-300.046000
502020-06-300.037000
512021-03-310.035000
522022-05-310.035000
532020-07-310.039000
542020-11-300.034000
552023-10-310.052000
562023-05-310.050000
572023-07-310.047000
582026-07-310.050000
592020-08-310.040000
602020-09-300.036000
612021-04-300.032000
622022-06-300.035000
632024-07-310.051000
642024-11-290.048000
652025-05-300.052000
662025-07-310.051000
672020-10-300.036000
682022-01-310.034000
692022-04-290.031000
702023-08-310.052000
712021-08-310.033000
722025-02-280.046000
732026-04-300.050000
742022-10-310.043000
752023-03-310.046000
762024-01-310.050000
772024-10-310.050000
782020-01-310.036000
792023-01-310.046000
802023-02-280.042000
812025-03-310.052000