f/overrides/event-backup/mdyv-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
22023-06-200.330000
32008-03-200.166500
42012-09-210.130500
52018-06-180.249000
62019-12-230.313000
72007-12-210.163000
82014-12-191.238000
92019-03-180.183000
102018-09-240.233000
112019-06-240.259000
122023-03-200.241000
132011-06-170.113000
142011-12-160.136000
152014-06-200.170000
162016-03-180.172500
172013-03-150.090500
182022-12-190.329000
192024-12-230.478000
202006-06-160.158000
212007-03-160.116000
222011-03-180.086500
232012-12-210.254000
242017-03-170.166500
252021-03-220.295000
262023-12-180.302000
272022-03-210.248000
282025-12-220.394000
292008-06-200.194000
302016-06-170.200500
312018-03-190.236500
322018-12-240.293000
332024-06-240.390000
342024-09-230.360000
352025-06-230.420000
362006-09-150.137500
372012-03-160.108500
382013-09-200.151500
392024-03-180.285000
402009-09-180.137000
412014-03-210.143500
422016-09-160.220500
432019-09-230.250000
442017-06-160.222000
452022-06-210.335000
462025-03-240.246000
472026-06-220.421000
482010-06-180.151000
492013-12-200.157000
502015-03-200.098000
512015-09-180.193500
522010-03-190.119000
532020-06-220.252000
542022-09-190.320000
552025-09-220.394000
562014-09-190.174500
572015-06-190.193500
582020-03-230.293000
592021-12-200.390000
602006-12-150.637500
612009-03-200.150500
622011-09-160.116000
632013-06-210.156500
642021-06-210.315000
652005-12-160.081500
662010-12-170.194000
672015-12-181.125500
682017-12-150.686000
692006-03-170.111500
702007-09-210.155000
712012-06-150.130000
722007-06-150.168500
732008-12-190.185000
742016-12-160.267000
752023-09-180.293000
762020-09-210.153000
772020-12-210.243000
782008-09-190.211500
792009-06-190.140000
802009-12-180.118000
812017-09-150.201500
822010-09-170.143500
832026-03-230.380000