f/overrides/event-backup/ivoax-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

935 B

1DateDividends
22016-12-080.067000
32019-09-120.050000
42021-03-110.025000
52022-09-150.083000
62025-06-200.076000
72016-09-150.035000
82019-12-120.140000
92022-06-070.049000
102022-12-020.485000
112015-03-120.015000
122020-06-110.050000
132021-09-160.040000
142017-12-140.109000
152017-03-160.001000
162018-06-140.045000
172018-12-130.382000
182019-03-140.025000
192023-03-220.048000
202024-09-200.068000
212016-06-160.010000
222019-06-130.050000
232020-09-100.060000
242021-06-100.035000
252023-09-220.083000
262023-12-040.750000
272024-12-031.866000
282018-03-150.025000
292018-09-130.050000
302020-12-100.071000
312021-12-160.534000
322022-03-100.032000
332024-03-220.062000
342024-06-210.069000
352025-12-022.343000
362017-06-150.010000
372015-06-110.040000
382015-12-100.087000
392017-09-140.035000
402020-03-120.050000
412023-06-220.078000
422025-09-220.065000
432026-06-220.134000
442014-12-110.039000
452025-03-210.076000
462026-03-200.051000
472015-09-100.040000