f/overrides/event-backup/ivoo-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

995 B

1DateDividends
22015-09-210.457000
32016-12-200.279000
42022-03-240.183000
52024-06-280.371000
62024-12-230.596000
72013-12-200.415500
82015-12-170.222500
92016-03-210.125000
102017-03-220.063500
112017-06-280.205500
122017-12-190.297000
132019-09-260.287000
142022-12-200.413000
152025-12-220.427000
162018-03-260.117000
172019-03-250.123000
182022-09-280.423000
192023-03-240.206000
202024-09-270.360000
212012-12-240.362500
222014-12-220.612500
232018-06-280.227000
242020-12-220.392000
252021-12-210.379000
262025-09-240.385000
272026-03-240.350000
282010-12-270.090000
292016-09-200.239000
302017-09-270.212500
312025-06-260.351000
322021-03-260.159000
332021-09-290.317500
342022-06-230.270000
352023-12-200.444000
362016-06-210.117500
372018-09-260.272500
382019-06-270.269500
392019-12-160.355500
402020-03-100.133000
412020-06-250.241000
422023-06-290.276000
432011-12-230.237500
442018-12-130.258500
452020-09-110.191500
462021-06-240.233000
472023-09-280.249000
482024-03-220.231000
492025-03-250.346000
502026-06-240.345000