f/overrides/event-backup/efa-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

955 B

1DateDividends
22019-06-171.376000
32020-06-150.858000
42001-10-020.055333
52004-12-230.803000
62009-06-230.945000
72009-12-220.496000
82013-12-180.552000
92017-12-190.743000
102021-06-101.102000
112024-06-111.393000
122007-12-242.000000
132021-12-131.352000
142011-12-200.569000
152013-06-271.152000
162015-12-210.508000
172016-12-210.596000
182024-12-171.057000
192026-06-151.636000
202025-06-161.519000
212001-12-240.027333
222003-12-220.522667
232005-12-231.110000
242012-06-211.149000
252018-06-191.354000
262020-12-140.694000
272002-12-230.627333
282008-12-230.541000
292010-12-210.538000
302018-12-180.638000
312022-06-091.498000
322025-12-161.728000
332003-12-160.156667
342010-06-230.859000
352011-06-221.141000
362019-12-160.776000
372023-06-071.311000
382023-12-200.931000
392012-12-180.610000
402014-06-251.676000
412015-06-251.111000
422017-06-201.062000
432021-12-300.163000
442022-12-130.268000
452006-12-211.533000
462008-06-251.308000
472014-12-170.585000
482016-06-221.175000