f/overrides/event-backup/aqmnx-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

478 B

1DateDividendsctime
22014-12-220.9342017-10-31 12:27:18
32015-12-210.6352017-10-31 12:27:18
42016-12-200.0022017-10-31 12:27:18
52010-04-300.0672017-10-31 12:27:18
62010-12-170.2292017-10-31 12:27:18
72011-12-160.0532017-10-31 12:27:18
82012-12-140.0752017-10-31 12:27:18
92013-12-200.1072017-10-31 12:27:18
102014-12-190.9342017-10-31 12:27:18
112019-12-230.2382020-04-15 13:22:12
122013-12-200.1072020-04-15 13:22:12
132014-12-190.9342020-04-15 13:22:12