f/overrides/event-backup/nichx-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

655 B

1DateDividends
22024-09-270.623000
32024-12-300.831000
42025-09-290.605000
52019-09-270.397000
62020-06-290.400000
72021-06-290.414000
82024-06-270.625000
92019-12-300.400000
102021-09-290.421000
112025-12-300.605000
122026-04-290.196000
132020-12-300.401000
142021-12-300.424000
152023-12-281.609000
162025-06-270.609000
172026-06-290.195000
182018-12-280.468000
192022-03-300.422000
202022-12-290.434000
212026-03-300.600000
222021-03-300.408000
232023-03-300.437000
242023-06-290.438000
252023-09-280.443000
262025-03-280.615000
272019-03-280.402000
282020-03-300.404000
292020-09-290.399000
302026-07-300.195000
312019-06-270.387000
322024-03-280.650000
332026-05-280.196000