f/overrides/event-backup/dol-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

1.5 KiB

1DateDividends
22014-12-190.377000
32021-09-240.490000
42010-06-280.838000
52011-12-210.286000
62018-03-200.189000
72011-03-210.205000
82012-06-250.792000
92016-12-230.331000
102019-03-260.310000
112006-12-210.302000
122009-06-220.981000
132009-12-210.236000
142019-06-240.810000
152020-03-240.189000
162021-03-250.332000
172015-03-230.258000
182017-03-270.235000
192017-12-260.326000
202022-06-241.015000
212024-12-310.008000
222013-03-220.229000
232013-09-230.294000
242015-09-210.263000
252020-12-210.320000
262022-12-230.224000
272023-09-250.315000
282011-06-221.066000
292013-12-240.337000
302018-09-250.283000
312017-09-260.290000
322019-12-230.321000
332023-06-260.900000
342009-09-210.230000
352012-09-240.231000
362016-06-200.770000
372023-03-270.445000
382014-03-240.800000
392017-06-260.755000
402019-09-240.275000
412015-12-210.278000
422025-06-250.985000
432026-03-260.205000
442012-03-260.223000
452014-09-220.287000
462020-09-220.345000
472025-03-260.230000
482021-06-240.595000
492021-12-270.353000
502024-09-250.245000
512025-09-250.265000
522026-06-251.000000
532016-09-260.210000
542022-09-260.360000
552025-12-260.380000
562018-06-250.939000
572018-12-240.301000
582022-03-250.370000
592024-03-220.310000
602010-03-290.198000
612010-12-220.317000
622015-06-220.780000
632014-06-230.880000
642024-06-250.980000
652007-12-171.379000
662011-09-260.329000
672013-06-240.803000
682012-12-240.297000
692016-03-210.222000
702020-06-230.440000
712023-12-220.320000
722024-12-260.326000
732008-12-222.356000
742009-03-230.060000
752010-09-200.226000