f/overrides/event-backup/ndarx-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

875 B

1DateDividends
22021-12-300.405000
32023-12-280.202000
42017-12-270.129000
52020-03-270.069000
62021-03-300.063000
72017-09-270.065000
82018-03-270.063000
92021-09-290.062000
102022-09-290.066000
112024-09-260.087000
122016-12-280.122000
132017-03-290.058000
142017-06-280.063000
152026-03-270.082000
162015-12-290.072000
172020-12-230.159000
182018-12-270.263000
192026-06-260.096000
202020-09-280.067000
212023-09-280.074000
222025-09-260.092000
232016-06-280.060000
242019-03-270.066000
252019-12-270.284000
262023-06-290.079000
272024-06-260.083000
282024-12-270.176000
292025-06-260.091000
302025-12-290.610000
312022-03-300.062000
322022-12-290.458000
332023-03-300.071000
342019-09-260.071000
352025-03-270.083000
362016-03-290.059000
372018-06-270.067000
382019-06-260.068000
392021-06-290.065000
402022-06-290.068000
412024-03-260.074000
422016-09-270.063000
432018-09-260.066000
442020-06-260.070000