f/overrides/event-backup/czmgx-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

375 B

1DateDividends
22018-06-151.447000
32019-06-130.352000
42020-12-080.954000
52021-06-161.174000
62021-12-081.837000
72025-06-022.316000
82018-12-070.823000
92020-03-170.007000
102020-06-150.540000
112023-06-160.238000
122023-12-080.711000
132022-06-161.113000
142017-06-160.477000
152017-12-080.201000
162019-12-060.484000
172022-12-080.206000
182024-06-181.013000
192024-12-091.219000