f/overrides/event-backup/amfax-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

455 B

1DateDividends
22015-12-290.113000
32019-03-290.036000
42020-12-300.319000
52021-12-300.571000
62024-12-180.110000
72025-12-160.088000
82025-12-300.052000
92015-04-080.397000
102014-12-291.380000
112019-12-300.436000
122012-04-100.060000
132012-12-240.026000
142019-01-310.033000
152019-04-300.032000
162022-12-293.282000
172023-12-200.027000
182010-12-310.734000
192014-04-080.095000
202018-04-100.118000
212019-02-280.030000
222022-04-070.031000
232011-12-300.297000