f/overrides/event-backup/cdeyx-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

955 B

1DateDividends
22018-06-210.055000
32018-09-210.063000
42019-03-200.058000
52019-12-130.661000
62020-09-220.051000
72021-06-180.060000
82021-12-140.980000
92016-03-230.055000
102024-03-200.074000
112024-09-200.073000
122022-09-210.075000
132015-12-141.489000
142016-09-220.046000
152017-12-130.893000
162023-06-210.081000
172014-12-101.156000
182017-03-220.048000
192018-12-131.293000
202020-03-200.063000
212023-09-210.073000
222024-06-210.070000
232025-12-111.225000
242016-06-230.054000
252015-06-180.078000
262017-09-210.047000
272019-09-200.064000
282020-12-110.060000
292022-06-210.066000
302022-12-131.195000
312023-03-200.068000
322015-03-180.060000
332025-03-200.055000
342025-09-190.051000
352023-12-130.716000
362017-06-210.047000
372025-06-200.060000
382016-12-140.304000
392019-06-170.065000
402021-09-210.062000
412018-03-210.053000
422020-06-170.065000
432021-03-180.058000
442022-03-180.061000
452024-12-121.348000
462026-03-190.040000
472026-06-180.050000
482015-09-170.074000