f/overrides/event-backup/diisx-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

635 B

1DateDividends
22019-12-270.497000
31999-12-220.180000
42001-12-140.127000
52012-12-240.394000
62016-12-220.425000
72009-12-240.417000
82010-12-270.325000
92020-12-290.305000
102022-12-280.375000
112023-12-280.605000
121997-12-260.100000
132005-12-290.274000
142006-12-270.382000
152021-12-290.689000
162008-12-240.272000
172015-12-230.319000
182011-12-230.439000
192025-12-301.094000
202013-12-230.562000
212014-12-230.434000
222002-06-280.047000
232002-10-310.051000
242002-12-090.195000
252010-04-300.024000
262007-12-260.488000
272018-12-270.400000
282024-12-300.602000
291998-12-280.090000
302003-12-100.463000
312004-12-290.270000
322017-12-220.389000