f/overrides/event-backup/nfj-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

1.7 KiB

1DateDividends
22020-06-120.225000
32021-12-170.225000
42023-06-090.245000
52008-12-240.410000
62011-06-160.450000
72011-09-150.450000
82012-12-260.450000
92015-12-230.300000
102024-09-130.305000
112017-03-090.300000
122019-12-200.225000
132025-09-120.305000
142007-03-220.525000
152013-09-120.450000
162014-03-130.450000
172016-03-100.300000
182016-12-220.300000
192021-03-120.225000
202009-03-190.150000
212015-09-100.450000
222016-06-090.300000
232019-06-140.225000
242020-12-180.225000
252006-09-210.525000
262010-06-170.150000
272012-06-140.450000
282015-03-120.450000
292023-03-100.245000
302008-09-180.525000
312010-03-180.150000
322018-09-140.225000
332024-12-120.305000
342026-03-160.305000
352006-03-230.525000
362009-12-230.150000
372005-06-150.525000
382013-03-140.450000
392014-06-120.450000
402022-06-100.245000
412023-12-080.245000
422013-12-240.450000
432017-06-080.300000
442019-03-080.225000
452024-03-080.280000
462007-06-210.525000
472019-09-130.225000
482026-06-150.305000
492008-06-190.525000
502010-09-160.150000
512012-03-150.450000
522005-09-230.525000
532005-12-280.600000
542007-09-200.525000
552007-12-270.670000
562008-03-190.525000
572014-09-110.450000
582014-12-240.450000
592011-12-280.450000
602013-06-130.450000
612018-03-090.225000
622022-12-290.017000
632025-03-130.305000
642024-06-130.280000
652016-09-080.300000
662017-12-220.225000
672018-12-210.225000
682020-09-110.225000
692021-09-100.225000
702009-09-170.150000
712015-06-110.450000
722022-03-110.245000
732022-12-090.245000
742025-06-120.305000
752006-06-220.525000
762020-03-130.225000
772021-06-110.225000
782023-09-080.245000
792009-06-180.150000
802025-12-110.305000
812018-06-080.225000
822022-09-090.245000
832006-12-270.525000
842010-12-290.450000
852011-03-170.450000
862012-09-130.450000
872017-09-080.300000