f/overrides/event-backup/ewc-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
22000-08-245.057000
32025-12-160.475000
41998-12-220.055000
52009-06-230.090000
62010-06-230.180000
72015-06-250.212000
82023-12-200.486000
91996-12-230.023000
101999-08-250.566000
112003-12-220.202000
122014-12-170.385000
132020-06-150.258000
141998-08-250.642000
152008-06-250.117000
162010-12-210.318000
171999-12-210.004000
182004-12-230.198000
192006-12-200.285000
202023-06-070.346000
211997-12-230.070000
222012-12-180.377000
232013-06-270.304000
242021-06-100.233000
252022-06-090.276000
262022-12-130.491000
272007-12-240.389000
282014-06-250.235000
292018-06-190.224000
302018-12-180.409000
312025-06-160.306000
322005-12-230.149000
332003-12-160.030000
342019-12-160.394000
352020-12-140.385000
362024-12-170.550000
372026-06-150.275000
381996-08-260.041000
391997-08-250.169000
402001-12-240.010000
412008-12-230.327000
422012-06-210.216000
432013-12-180.388000
442024-06-110.349000
452011-12-200.353000
462015-12-210.290000
472016-06-220.196000
482016-12-210.263000
492000-12-200.292000
502017-12-190.369000
512021-12-130.478000
522001-08-240.075000
532002-12-230.030000
542009-12-220.241000
552011-06-220.206000
562017-06-200.215000
572019-06-170.253000