f/overrides/event-backup/jiybx-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

1015 B

1DateDividends
22015-09-300.081000
32023-12-290.567000
42021-03-310.074000
52017-12-290.151000
62020-12-150.437000
72020-12-310.101000
82018-12-310.122000
92025-12-310.661000
102013-12-310.115000
112014-09-300.094000
122017-03-310.063000
132016-03-310.070000
142017-06-300.040000
152018-06-290.145000
162018-09-280.118000
172022-12-300.467000
182012-09-280.094000
192013-03-280.057000
202014-03-310.069000
212014-12-170.119000
222014-12-310.097000
232015-03-310.055000
242015-12-310.123000
252016-12-300.134000
262012-12-310.116000
272013-06-280.078000
282013-12-180.008000
292019-09-300.125000
302020-03-310.097000
312021-12-150.550000
322015-06-300.097000
332016-09-300.100000
342017-09-290.094000
352020-06-300.100000
362021-12-310.170000
372012-12-210.003000
382013-09-300.055000
392014-06-300.106000
402021-09-300.082000
412016-06-300.102000
422019-12-310.145000
432021-06-300.117000
442018-12-140.500000
452019-03-290.098000
462019-06-280.157000
472020-09-300.096000
482024-12-310.653000
492015-12-180.016000
502017-06-200.052000
512018-03-290.081000