f/overrides/event-backup/ech-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

875 B

1DateDividends
22008-12-230.113000
32009-06-230.413000
42011-12-200.044000
52012-06-210.881000
62018-06-190.920000
72022-06-091.135000
82020-12-140.147000
92025-06-160.672000
102019-06-170.750000
112011-12-280.041000
122012-12-180.066000
132014-06-250.637000
142017-06-200.694000
152017-12-190.049000
162018-12-180.061000
172020-06-150.506000
182024-06-110.698000
192009-12-220.185000
202016-06-220.676000
212008-06-250.533000
222014-12-170.057000
232015-06-250.565000
242023-12-200.176000
252025-12-300.078000
262022-12-130.689000
272023-06-071.168000
282012-12-270.022000
292013-06-270.626000
302013-12-180.026000
312019-12-160.074000
322021-12-130.682000
332021-12-300.088000
342016-12-210.015000
352021-06-100.497000
362007-12-240.049000
372010-06-230.507000
382010-12-290.033000
392011-06-220.945000
402013-12-270.025000
412015-12-210.115000
422024-12-170.084000
432025-12-160.063000
442026-06-150.645000