f/overrides/event-backup/cubrx-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

1.6 KiB

1DateDividends
22024-06-280.069000
32024-11-290.065000
42025-04-300.062000
52020-09-300.035000
62020-12-310.036000
72021-08-310.032000
82022-12-060.247000
92023-01-310.059000
102021-12-310.031000
112022-05-310.038000
122023-04-280.062000
132020-01-310.039000
142020-03-310.039000
152020-05-290.039000
162020-10-300.035000
172021-07-300.030000
182023-05-310.065000
192023-11-300.069000
202022-12-300.061000
212024-01-310.066000
222024-07-310.070000
232026-02-270.060000
242023-02-280.063000
252025-01-310.063000
262021-05-280.040000
272021-10-290.027000
282024-02-290.068000
292025-07-310.065000
302025-12-310.066000
312024-08-300.069000
322025-11-280.061000
332026-07-310.059000
342021-09-300.027000
352022-11-300.058000
362023-07-310.065000
372021-11-300.035000
382022-08-310.050000
392023-03-310.062000
402023-06-300.062000
412025-08-290.064000
422025-09-300.063000
432022-09-300.047000
442023-09-290.068000
452023-10-310.067000
462023-12-290.068000
472025-05-300.064000
482020-11-300.042000
492022-10-310.049000
502024-04-300.069000
512024-05-310.069000
522026-05-290.059000
532020-06-300.032000
542020-07-310.036000
552026-03-310.061000
562019-12-310.038000
572020-04-300.036000
582021-03-310.034000
592022-04-290.034000
602024-09-300.067000
612026-01-300.060000
622020-02-280.040000
632021-01-290.032000
642023-08-310.066000
652024-03-280.069000
662025-02-280.060000
672024-10-310.066000
682025-03-310.063000
692025-06-300.063000
702019-10-310.040000
712020-08-310.039000
722022-01-310.031000
732022-06-300.038000
742022-07-290.043000
752021-02-260.038000
762022-02-280.034000
772024-12-310.064000
782025-10-310.062000
792026-06-300.059000
802019-11-290.038000
812021-04-300.034000
822021-06-300.033000
832022-03-310.033000
842026-04-300.058000