f/overrides/event-backup/fiasx-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

515 B

1DateDividends
22024-12-130.719000
32005-12-092.938000
42007-12-075.202000
52009-12-040.397000
62015-12-040.871000
72018-12-071.383000
82021-12-280.118000
92006-12-085.650000
102012-12-070.401000
112019-12-060.582000
122020-12-040.169000
132023-12-080.499000
142023-12-270.013000
152025-12-121.228000
162004-12-100.790000
172010-04-230.025000
182010-12-030.677000
192011-12-020.380000
202016-12-090.565000
212021-12-032.153000
222003-12-120.330000
232013-12-060.648000
242014-12-053.611000
252017-12-080.967000
262022-12-090.111000