f/overrides/event-backup/affcx-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

2.4 KiB

1DateDividends
22018-05-300.031000
32021-12-280.031000
42020-08-280.024000
52017-02-020.050000
62019-07-300.037000
72022-04-280.024000
82023-06-290.027000
92023-07-280.025000
102023-12-280.025000
112017-07-280.045000
122018-08-300.031000
132020-12-280.049000
142022-12-280.034000
152025-02-030.031000
162016-07-280.065000
172019-04-290.038000
182019-11-270.025000
192020-07-300.030000
202025-11-260.025000
212021-05-270.025000
222024-08-290.026000
232018-02-020.002000
242024-02-280.024000
252018-12-270.063000
262019-02-270.039000
272019-05-300.037000
282026-07-300.028000
292026-02-020.028000
302017-08-300.043000
312018-03-280.032000
322020-06-290.031000
332020-10-290.028000
342021-09-290.022000
352024-04-290.028000
362025-07-300.025000
372022-09-290.030000
382022-10-280.031000
392024-02-010.031000
402016-12-290.054000
412020-11-270.035000
422022-05-270.026000
432017-04-270.045000
442023-09-280.025000
452026-04-290.028000
462017-12-280.086000
472018-04-270.032000
482022-02-010.021000
492018-09-270.033000
502020-02-270.024000
512020-04-290.031000
522023-04-270.025000
532024-05-300.028000
542026-06-290.025000
552016-08-300.063000
562018-06-280.031000
572019-03-280.038000
582021-02-250.020000
592022-11-290.029000
602025-02-270.024000
612026-05-280.024000
622016-10-280.062000
632017-09-280.044000
642017-10-300.042000
652021-10-280.023000
662021-11-290.023000
672017-02-270.048000
682024-10-300.028000
692025-10-300.029000
702026-02-260.023000
712019-12-270.040000
722025-04-290.027000
732025-08-280.026000
742022-08-300.029000
752023-10-300.027000
762024-06-270.025000
772025-12-300.030000
782018-02-270.034000
792021-08-300.023000
802022-06-290.030000
812022-07-280.026000
822026-03-300.027000
832016-09-290.063000
842020-05-280.031000
852023-05-300.026000
862023-11-290.027000
872024-03-270.022000
882017-11-290.042000
892020-09-290.024000
902021-02-010.027000
912021-03-300.026000
922023-02-010.024000
932023-02-270.021000
942023-03-300.030000
952025-03-280.026000
962016-11-290.049000
972017-03-300.044000
982018-11-290.037000
992019-09-270.033000
1002022-03-300.019000
1012023-08-300.029000
1022025-06-270.026000
1032018-10-300.033000
1042019-02-040.038000
1052025-09-290.025000
1062017-05-300.045000
1072018-07-300.033000
1082021-06-290.024000
1092024-12-300.027000
1102021-04-290.026000
1112021-07-290.023000
1122022-02-250.021000
1132024-09-270.024000
1142017-06-290.045000
1152019-08-290.034000
1162019-10-300.026000
1172019-06-270.038000
1182020-03-300.023000
1192025-05-290.029000
1202020-02-030.023000
1212024-07-300.028000
1222024-11-270.024000