f/overrides/event-backup/icsfx-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

1.1 KiB

1DateDividends
22021-03-250.133000
32013-12-130.093000
42015-09-170.105000
52019-03-210.123000
62013-09-190.093000
72015-06-180.108000
82021-12-142.281000
92024-09-260.143000
102020-09-170.141000
112024-12-122.589000
122013-03-210.092000
132017-06-150.124000
142019-06-200.132000
152023-12-131.976000
162025-03-270.143000
172025-12-112.380000
182018-09-130.127000
192020-06-180.123000
202022-03-240.132000
212016-06-160.123000
222017-12-130.698000
232019-12-131.554000
242023-06-220.143000
252014-09-180.108000
262016-09-150.124000
272017-03-160.127000
282023-09-280.143000
292022-09-220.159000
302023-03-230.143000
312016-03-170.124000
322018-12-141.919000
332019-09-190.148000
342024-06-270.143000
352025-09-250.148000
362026-06-250.149000
372017-09-140.125000
382018-03-220.110000
392020-03-190.123000
402021-06-240.135000
412021-09-230.133000
422022-12-143.100000
432013-06-200.092000
442015-03-190.108000
452020-12-110.197000
462015-12-112.095000
472018-06-210.110000
482014-03-200.096000
492014-06-190.097000
502022-06-230.161000
512024-03-280.143000
522025-06-260.143000
532026-03-260.150000
542012-12-070.090000
552014-12-120.212000
562016-12-131.580000