f/overrides/event-backup/igbzx-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

3.1 KiB

1DateDividends
22015-02-020.038000
32015-10-010.038000
42017-03-010.037000
52019-10-310.040000
62025-04-300.027000
72025-05-300.027000
82024-10-310.036000
92015-03-020.038000
102016-04-010.038000
112017-03-310.038000
122017-08-310.038000
132019-06-280.037000
142023-06-300.027000
152023-12-290.027000
162025-06-300.026000
172014-02-030.038000
182018-05-310.038000
192021-05-280.038000
202022-07-290.027000
212023-05-310.028000
222023-10-310.026000
232016-11-010.038000
242019-08-300.037000
252026-07-310.028000
262018-06-290.037000
272019-04-300.037000
282020-03-310.037000
292021-09-300.037000
302022-08-310.027000
312014-09-020.038000
322014-10-010.038000
332015-08-030.038000
342020-08-310.040000
352016-03-010.037000
362024-05-310.027000
372025-11-280.028000
382020-07-310.040000
392014-07-010.038000
402014-12-010.038000
412015-05-010.038000
422015-12-010.038000
432016-01-040.037000
442019-07-310.037000
452020-05-290.037000
462022-03-310.027000
472013-08-010.041000
482015-06-010.038000
492020-04-300.037000
502020-11-300.037000
512021-07-300.037000
522022-09-300.028000
532022-11-300.026000
542025-01-310.031000
552017-11-300.038000
562020-01-310.037000
572021-11-300.037000
582015-09-010.038000
592017-07-310.038000
602022-02-280.027000
612024-11-290.033000
622025-12-310.029000
632014-05-010.038000
642014-08-010.038000
652017-06-300.038000
662019-03-290.037000
672019-11-290.040000
682023-11-300.025000
692024-08-300.032000
702015-07-010.038000
712021-01-290.037000
722021-06-300.037000
732023-09-290.026000
742026-02-270.026000
752017-09-290.038000
762017-10-310.038000
772018-02-280.037000
782018-09-280.037000
792019-12-310.038000
802021-03-310.037000
812025-07-310.029000
822018-08-310.037000
832019-01-310.037000
842019-05-310.037000
852026-04-300.027000
862018-07-310.038000
872024-02-290.025000
882019-02-280.037000
892022-06-300.027000
902024-12-310.032000
912013-11-010.037000
922017-05-310.038000
932020-02-280.037000
942024-07-310.028000
952015-04-010.038000
962016-08-010.038000
972020-06-300.037000
982023-03-310.025000
992023-04-280.026000
1002024-04-300.026000
1012024-06-280.026000
1022025-10-310.029000
1032016-05-030.038000
1042018-01-310.038000
1052022-12-300.025000
1062023-02-280.020000
1072013-09-030.037000
1082014-03-030.038000
1092014-04-010.038000
1102018-11-300.037000
1112019-09-300.037000
1122025-03-310.029000
1132026-03-310.029000
1142017-02-010.037000
1152018-04-300.038000
1162020-12-310.037000
1172026-01-300.029000
1182014-01-020.038000
1192016-06-010.038000
1202017-04-280.038000
1212022-05-310.027000
1222025-09-300.028000
1232016-10-030.038000
1242017-01-030.038000
1252017-12-290.038000
1262020-09-300.037000
1272021-10-290.037000
1282025-02-280.027000
1292025-08-290.029000
1302026-05-290.028000
1312016-07-010.038000
1322018-03-290.038000
1332022-10-310.027000
1342013-07-010.038000
1352013-12-020.038000
1362014-11-030.038000
1372015-01-020.038000
1382022-01-310.028000
1392023-07-310.027000
1402021-02-260.037000
1412021-08-310.037000
1422021-12-310.037000
1432023-08-310.027000
1442024-03-280.027000
1452016-09-010.038000
1462018-10-310.037000
1472018-12-310.037000
1482020-10-300.037000
1492021-04-300.037000
1502024-09-300.033000
1512014-06-020.038000
1522016-02-010.038000
1532016-12-010.038000
1542022-04-290.027000
1552013-10-010.037000
1562015-11-020.038000
1572023-01-310.021000
1582024-01-310.028000
1592026-06-300.027000