f/overrides/event-backup/mdyg-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
22019-09-230.172000
32024-03-180.133000
42007-03-160.078000
52009-06-190.026000
62012-12-210.114667
72015-03-200.112333
82016-06-170.114333
92006-09-150.010000
102012-06-150.054667
112017-12-150.767667
122022-09-190.206000
132024-09-230.192000
142018-09-240.187000
152019-06-240.173000
162019-12-230.207000
172005-12-160.010000
182008-09-190.024667
192010-06-180.016000
202013-09-200.078667
212015-09-180.115000
222021-09-200.361000
232024-12-230.218000
242023-12-180.294000
252026-03-230.129000
262009-12-180.042667
272011-09-160.037667
282017-06-160.129667
292019-03-180.139000
302023-09-180.213000
312010-03-190.013000
322012-03-160.043333
332013-03-150.045000
342022-06-210.185000
352008-03-200.029000
362011-12-160.052667
372013-06-210.113333
382017-03-170.118667
392023-03-200.170000
402015-12-180.631333
412016-12-160.193000
422021-03-220.089000
432026-06-220.150000
442010-12-170.022000
452014-06-200.074667
462016-09-160.140000
472020-03-230.111000
482025-03-240.148000
492009-09-180.020000
502012-09-210.062667
512020-06-220.126000
522021-06-210.112000
532007-06-150.011667
542015-06-190.113667
552016-03-180.107667
562018-06-180.146000
572022-03-210.134000
582006-03-170.014333
592009-03-200.027000
602010-09-170.022667
612023-06-200.227000
622025-12-220.194000
632018-03-190.098333
642022-12-190.234000
652007-09-210.010333
662007-12-210.020667
672011-03-180.032667
682011-06-170.039000
692017-09-150.138333
702014-09-190.082000
712024-06-240.210000
722006-12-150.575667
732008-06-200.035333
742008-12-190.030000
752013-12-200.067667
762014-03-210.075000
772025-06-230.189000
782025-09-220.160000
792006-06-160.010667
802014-12-190.398667
812018-12-240.191000
822020-09-210.062000
832020-12-210.194000