f/overrides/event-backup/aaxj-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

735 B

1DateDividends
22017-12-191.234000
32018-06-190.408000
42022-12-130.787000
52014-06-250.500000
62013-06-270.516000
72023-06-070.397000
82023-12-201.108000
92009-12-220.507000
102011-06-220.660000
112015-06-250.405000
122016-12-210.638000
132021-12-131.546000
142025-06-160.560000
152010-12-210.608000
162021-06-100.279000
172015-12-210.900000
182016-06-220.335000
192017-06-200.287000
202024-06-110.265000
212024-12-171.074000
222009-06-230.195000
232011-12-200.391000
242014-12-170.586000
252019-06-170.411000
262020-06-150.263000
272020-12-140.684000
282010-06-230.355000
292012-12-180.541000
302013-12-270.025000
312025-12-161.125000
322012-06-210.508000
332018-12-180.928000
342019-12-160.933000
352022-06-090.337000
362026-06-150.421000
372013-12-180.525000