f/overrides/event-backup/csfzx-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

555 B

1DateDividends
22018-06-290.246000
32019-12-043.523000
42020-06-300.757000
52021-12-091.025000
62026-06-300.867000
72015-01-020.332000
82019-03-290.068000
92025-12-081.036000
102019-06-281.423000
112020-12-100.576000
122023-12-070.729000
132016-06-300.777000
142018-12-060.907000
152022-12-080.775000
162014-12-110.375000
172015-06-300.508000
182017-06-300.977000
192017-12-060.528000
202018-03-200.830000
212023-06-300.780000
222024-06-280.768000
232015-12-100.513000
242016-12-082.606000
252025-06-300.883000
262021-06-301.264000
272022-06-300.718000
282024-12-040.682000