f/overrides/event-backup/ardsx-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

415 B

1DateDividends
22010-12-300.156000
32012-12-280.269000
42016-12-290.469000
52017-10-190.286000
62024-12-200.770000
72008-12-300.094000
82009-12-300.116000
92011-12-290.214000
102013-12-300.400000
112022-12-280.751000
122021-12-281.236000
132025-12-191.779000
142014-12-300.613000
152015-12-300.822000
162017-12-280.181000
172018-12-271.024000
182020-12-290.938000
192018-12-310.355000
202019-12-301.139000
212023-12-210.320000