f/overrides/event-backup/napix-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

575 B

1DateDividends
22014-12-170.606000
32022-12-151.133000
42015-12-170.590000
52008-07-010.002000
62011-12-160.768000
72013-12-310.027000
82018-12-145.602000
92025-12-126.460000
102006-12-150.477000
112008-12-310.012000
122016-12-160.504000
132008-12-160.893000
142009-12-310.027000
152021-12-168.051000
162023-12-121.134000
172019-12-161.302000
182020-12-160.976000
192012-12-170.803000
202017-12-150.860000
212009-12-150.111000
222011-10-210.001000
232007-12-188.403000
242010-10-220.027000
252013-12-170.884000
262022-12-300.023000
272024-12-121.554000
282009-11-180.386000
292010-12-160.315000