f/overrides/event-backup/marnx-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

592 B

1DateDividendsctime
22019-03-290.0252019-12-31 12:12:37
32012-12-170.6072019-12-31 12:12:37
42013-12-060.7692019-12-31 12:12:37
52017-12-282.6782019-12-31 12:12:37
62014-11-280.8132019-12-31 12:12:37
72014-12-220.0492019-12-31 12:12:37
82019-04-300.0242019-12-31 12:12:37
92010-12-300.7272019-12-31 12:12:37
102011-12-290.0352019-12-31 12:12:37
112018-12-210.8632019-12-31 12:12:37
122015-12-161.1982019-12-31 12:12:37
132016-12-160.7992019-12-31 12:12:37
142019-01-310.0272019-12-31 12:12:37
152014-12-190.0492019-12-31 12:12:37
162019-02-280.0252019-12-31 12:12:37