f/overrides/event-backup/cbdyx-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
22014-12-101.440000
32022-03-160.134000
42022-06-160.136000
52016-09-190.135000
62017-03-170.116000
72018-09-190.174000
82019-06-130.195000
92021-09-170.128000
102025-06-170.248000
112015-06-180.243000
122017-09-190.148000
132018-06-150.159000
142020-06-150.173000
152022-12-081.780000
162015-03-200.074000
172015-09-220.246000
182015-12-100.928000
192019-03-180.147000
202020-09-180.145000
212022-09-190.156000
222025-12-082.789000
232016-12-090.284000
242021-03-160.115000
252024-06-180.274000
262024-12-093.228000
272016-03-170.105000
282017-06-160.135000
292017-12-080.799000
302019-12-061.307000
312021-06-160.121000
322018-03-160.116000
332018-12-071.740000
342019-09-180.199000
352020-12-082.130000
362023-03-160.156000
372023-09-190.282000
382023-12-080.236000
392025-03-180.251000
402025-09-170.281000
412026-06-160.267000
422016-06-170.122000
432020-03-170.173000
442021-12-084.409000
452023-06-160.249000
462024-03-180.254000
472024-09-180.297000
482026-03-170.273000