f/overrides/event-backup/ewg-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

855 B

1DateDividends
21998-12-220.040000
32001-08-240.189000
42002-12-230.122000
52013-06-270.435000
62014-06-250.631000
72016-06-220.613000
81997-08-250.131000
92024-06-110.758000
101999-08-250.469000
112010-06-230.285000
122022-06-090.792000
131998-08-250.273000
142015-06-250.506000
152017-06-200.595000
162021-12-300.247000
172009-12-220.014000
182003-12-220.201000
192004-12-230.194000
202005-12-230.116000
212006-12-200.508000
222009-06-230.544000
232012-06-210.581000
242020-06-150.280000
251997-12-230.030000
262008-06-251.149000
272008-12-230.073000
282011-06-220.674000
292016-12-210.009000
302018-06-190.744000
312026-06-150.832000
322007-12-240.518000
332017-12-190.084000
342021-06-100.603000
352021-12-130.036000
362025-06-160.679000
371996-08-260.119000
382019-06-170.738000
392020-12-140.387000
402022-12-130.009000
412023-06-070.759000
422023-12-200.002000
432000-08-242.532000