f/overrides/event-backup/ncirx-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

1.5 KiB

1DateDividends
22021-11-300.024000
32023-05-310.029000
42024-01-310.030000
52024-02-290.031000
62024-04-300.031000
72024-06-030.031000
82020-09-300.012000
92020-12-310.014000
102024-12-310.032000
112025-07-310.033000
122025-10-310.033000
132026-02-270.032000
142023-12-280.004000
152024-07-310.032000
162022-12-300.026000
172025-01-310.032000
182025-02-280.032000
192025-05-300.033000
202021-06-300.039000
212021-09-300.023000
222022-12-290.012000
232026-01-300.033000
242021-12-310.024000
252022-07-290.025000
262021-04-300.019000
272024-09-300.032000
282023-02-280.032000
292023-03-310.028000
302023-08-310.032000
312026-05-290.032000
322021-07-300.023000
332022-09-300.023000
342023-06-300.029000
352023-09-290.029000
362025-03-310.032000
372021-03-310.019000
382022-08-310.026000
392022-04-290.024000
402022-06-300.025000
412023-10-310.030000
422025-08-290.033000
432025-09-300.033000
442025-12-300.007000
452021-05-280.026000
462022-03-310.024000
472022-01-310.024000
482025-04-300.033000
492025-12-310.033000
502021-02-260.019000
512021-08-310.023000
522025-06-300.033000
532026-06-300.032000
542021-01-290.014000
552023-01-310.028000
562022-02-280.024000
572026-04-300.032000
582026-07-310.032000
592021-10-290.023000
602024-11-290.031000
612023-04-280.025000
622023-07-310.029000
632023-11-300.030000
642024-03-280.031000
652024-05-310.031000
662026-03-310.032000
672020-11-300.014000
682022-05-310.025000
692024-12-300.007000
702025-11-280.033000
712023-12-290.030000
722024-08-300.032000
732024-10-310.032000
742020-10-300.012000
752020-12-300.018000