f/overrides/event-backup/aiiex-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

655 B

1DateDividends
22024-12-121.614000
31994-12-150.042000
41996-12-160.449000
51997-12-150.063000
62013-12-130.363000
72020-12-114.107000
82023-12-130.358000
91998-12-160.316000
102014-12-121.566000
112005-12-160.177000
122009-12-110.294000
132015-12-110.385000
142019-12-133.489000
152025-12-113.744000
161995-12-150.006000
172000-12-141.484000
182003-12-120.022000
192007-12-142.017000
202022-12-162.348000
211992-12-150.013000
222018-12-142.752000
232021-12-166.939000
241993-12-150.011000
252006-12-150.276000
262008-12-120.392000
272010-04-300.028000
282016-12-130.372000
292017-12-130.927000
301999-12-150.926000
312010-12-100.267000
322011-12-090.323000
332012-12-070.288000