f/overrides/event-backup/lbisx-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

435 B

1DateDividends
22011-12-090.184000
32013-12-111.116000
42015-12-091.220000
52019-02-280.034000
62020-12-040.556000
72023-12-130.374000
82019-04-300.037000
92019-12-052.197000
102011-12-280.150000
112012-12-120.885000
122014-12-101.780000
132016-12-071.324000
142018-12-061.961000
152019-03-290.038000
162021-07-120.840000
172021-12-032.557000
182022-12-132.486000
192025-12-112.741000
202019-01-310.038000
212017-12-061.742000
222024-12-122.275000