f/overrides/event-backup/mdidx-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

455 B

1DateDividends
22009-12-280.171000
32016-12-280.299000
42017-12-270.280000
52025-12-231.367000
62004-12-300.083000
72005-12-290.383000
82006-12-270.841000
92007-12-281.791000
102010-12-280.097000
112020-12-290.342000
122022-12-280.481000
132012-12-270.144000
142013-12-270.144000
152014-12-290.191000
162019-12-260.480000
172021-12-280.612000
182023-12-270.864000
192024-12-260.737000
202008-12-260.341000
212011-12-270.109000
222015-12-290.245000
232018-12-270.491000