f/overrides/event-backup/ccyix-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
22020-06-101.561000
32024-06-120.974000
42025-06-100.610000
52014-12-092.511000
62015-06-030.384000
72020-12-172.900000
82021-06-101.217000
92022-06-080.670000
102025-12-170.779000
112018-06-121.618000
122018-12-188.393000
132026-06-100.402000
142015-12-091.744000
152021-12-204.234000
162017-06-010.384000
172017-12-182.917000
182019-06-122.057000
192019-12-171.777000
202024-12-181.885000
212016-06-070.258000
222016-12-070.284000