f/overrides/event-backup/csaax-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

355 B

1DateDividends
22016-12-140.287000
32021-12-220.834000
42023-12-200.025000
52024-12-180.148000
62025-03-210.049000
72026-06-230.027000
82025-12-180.128000
92013-12-130.292000
102022-12-201.840000
112025-09-190.017000
122015-12-310.492000
132019-12-270.144000
142025-06-230.021000
152026-03-200.052000
162014-12-120.635000
172014-12-310.010000
182015-12-140.415000