f/overrides/event-backup/acgzx-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
22024-08-300.031000
32020-03-310.021000
42020-06-300.028000
52022-12-300.029000
62023-05-310.028000
72023-06-300.028000
82023-12-290.029000
92019-11-290.009000
102019-12-310.027000
112021-06-300.025000
122023-04-280.030000
132024-07-310.029000
142025-01-310.030000
152025-09-300.025000
162025-12-310.025000
172020-08-310.027000
182022-01-310.021000
192023-10-310.027000
202025-03-310.027000
212025-10-310.029000
222020-11-300.024000
232021-09-300.022000
242024-04-300.028000
252024-12-310.027000
262020-10-300.028000
272020-12-310.026000
282022-07-290.028000
292022-10-310.020000
302023-02-280.026000
312023-09-290.021000
322026-02-270.024000
332020-07-310.031000
342024-01-310.029000
352024-11-290.028000
362025-11-280.024000
372026-05-290.026000
382026-04-300.026000
392026-06-300.026000
402021-04-300.026000
412021-07-300.025000
422021-12-310.022000
432022-09-300.021000
442022-11-300.031000
452025-05-300.029000
462024-03-280.028000
472025-08-290.028000
482020-01-310.028000
492020-09-300.028000
502021-03-310.027000
512021-05-280.024000
522022-04-290.023000
532024-02-290.027000
542021-01-290.027000
552021-08-310.023000
562025-07-310.027000
572021-10-290.021000
582023-07-310.020000
592024-10-310.029000
602025-06-300.026000
612022-05-310.019000
622022-08-310.029000
632023-03-310.035000
642023-08-310.020000
652025-04-300.029000
662026-01-300.027000
672020-02-280.023000
682020-04-300.025000
692021-11-300.021000
702023-11-300.028000
712024-06-280.028000
722025-02-280.026000
732020-05-290.029000
742021-02-260.024000
752022-03-310.020000
762024-09-300.029000
772022-02-280.022000
782022-06-300.016000
792023-01-310.032000
802024-05-310.031000
812026-03-310.026000