f/overrides/event-backup/etho-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

715 B

1DateDividends
22017-09-190.060000
32018-06-190.080000
42019-03-260.060000
52025-12-300.559000
62016-09-130.070000
72018-09-250.070000
82024-12-300.146000
92021-12-280.140000
102023-03-220.100000
112017-06-200.050000
122017-12-260.117000
132018-03-200.040000
142020-12-140.170000
152021-03-230.070000
162022-03-230.089000
172023-09-200.150000
182020-03-170.050000
192023-06-210.180000
202024-06-270.135000
212023-12-270.431000
222016-12-280.224000
232017-03-210.050000
242019-06-280.080000
252019-12-300.120000
262020-06-150.110000
272020-09-150.070000
282022-06-220.120000
292016-06-200.030000
302021-06-220.100000
312024-09-270.133000
322018-12-240.101000
332019-09-200.090000
342021-09-210.120000
352022-09-210.120000
362022-12-280.207000