f/overrides/event-backup/cnya-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

415 B

1DateDividends
22020-12-140.354000
32022-12-130.774000
42017-06-200.113000
52017-12-190.200000
62018-12-180.775000
72019-12-160.255000
82025-12-160.550000
92016-12-210.341000
102019-06-170.114000
112020-06-150.095000
122021-12-130.411000
132023-06-070.061000
142023-12-201.031000
152025-06-160.112000
162026-06-150.098000
172018-06-190.115000
182021-06-100.073000
192022-06-090.066000
202024-06-110.077000
212024-12-170.624000