f/overrides/event-backup/ivosx-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
22023-03-220.059000
32018-09-130.065000
42020-03-120.066000
52020-06-110.064000
62024-06-210.086000
72024-09-200.085000
82021-12-160.552000
92022-09-150.096000
102022-12-020.523000
112023-06-220.088000
122023-09-220.099000
132014-12-110.045000
142016-09-150.044000
152019-06-130.066000
162026-06-220.148000
172023-12-040.767000
182025-09-220.080000
192026-03-200.065000
202024-12-031.885000
212025-06-200.092000
222015-12-100.095000
232019-09-120.067000
242022-06-070.061000
252018-06-140.057000
262019-03-140.038000
272021-06-100.054000
282025-03-210.091000
292015-06-110.048000
302016-06-160.016000
312017-06-150.017000
322018-12-130.398000
332019-12-120.156000
342021-03-110.042000
352022-03-100.051000
362017-09-140.057000
372017-12-140.123000
382018-03-150.039000
392024-03-220.081000
402015-03-120.023000
412017-03-160.014000
422020-12-100.086000
432021-09-160.059000
442025-12-022.360000
452015-09-100.048000
462016-12-080.077000
472020-09-100.076000