f/overrides/event-backup/nscfx-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

456 B

1DateDividends
22015-12-150.064000
32019-01-092.720000
42020-12-300.463000
52024-12-1612.329000
62018-12-175.255000
72021-12-155.658000
82022-12-151.386000
92022-12-291.518000
102025-12-154.232000
112025-12-300.441000
122023-12-280.402000
132024-12-300.723000
142016-12-151.356000
152017-12-152.115000
162019-03-072.690000
172019-04-092.700000
182019-12-162.729000
192021-12-300.091000
202019-02-072.690000
212019-05-092.690000
222019-12-300.192000
232023-12-150.119000