f/overrides/event-backup/iym-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

2.1 KiB

1DateDividends
22023-03-230.456000
32024-09-250.612000
42010-12-220.322000
52013-06-260.485000
62015-12-240.466000
72018-12-170.296000
82019-03-200.397000
92021-09-240.520000
102017-09-260.455000
112001-10-010.235000
122001-06-080.125000
132005-03-240.112000
142005-09-230.214000
152004-03-260.120000
162008-09-240.329000
172013-12-230.414000
182021-12-130.702000
192003-12-310.043000
202015-09-250.398000
212021-03-250.421000
222022-12-130.707000
232025-12-160.757000
242002-09-130.169000
252007-12-270.341000
262020-12-140.419000
272007-03-230.181000
282013-03-250.293000
292020-06-150.410000
302003-06-130.172000
312014-03-250.226000
322019-09-240.497000
332006-06-220.274000
342014-09-240.368000
352015-06-240.311000
362022-03-240.424000
372004-09-240.168000
382009-06-240.152000
392010-06-240.218000
402011-03-250.171000
412020-09-230.407000
422002-03-080.063000
432004-12-230.235000
442006-12-200.441000
452016-12-210.364000
462000-10-180.175000
472019-12-160.624000
482000-07-190.030000
492009-12-230.357000
502025-03-180.478000
512002-12-130.198000
522005-12-220.337000
532006-03-240.190000
542007-06-280.280000
552010-03-250.105000
562003-12-120.211000
572012-06-190.337000
582018-06-260.441000
592019-06-170.525000
602022-09-260.717000
612024-03-210.459000
622011-06-240.349000
632021-06-100.436000
642002-06-140.181000
652023-06-070.527000
662022-06-090.826000
672006-09-260.269000
682013-09-240.268000
692014-12-240.565000
702016-09-260.330000
712016-03-230.221000
722025-09-160.619000
732026-06-150.487000
742008-12-230.410000
752009-03-250.174000
762011-12-220.572000
772015-03-250.260000
782017-06-270.422000
792018-03-220.329000
802001-03-090.147000
812020-03-250.341000
822008-03-250.195000
832004-06-250.218000
842014-06-240.298000
852018-09-260.346000
862003-03-070.117000
872009-09-220.172000
882016-06-210.309000
892003-12-160.158000
902024-12-170.574000
912025-06-160.474000
922005-06-200.203000
932023-12-200.733000
942007-09-250.243000
952011-09-230.338000
962012-12-190.501000
972003-09-120.134000
982017-03-240.241000
992017-12-190.345000
1002026-03-170.468000
1012000-12-200.253000
1022008-06-250.247000
1032012-03-260.209000
1042012-09-250.298000
1052001-12-140.107000
1062010-09-230.221000
1072023-09-260.728000
1082024-06-110.502000