f/overrides/event-backup/hack-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

495 B

1DateDividends
22021-12-280.017000
32022-06-220.020000
42023-09-200.010000
52016-06-200.070000
62019-12-300.040000
72020-03-170.580000
82020-12-140.040000
92024-03-260.001000
102019-06-280.020000
112022-03-230.025000
122022-12-280.059000
132023-12-270.084000
142024-06-270.026000
152024-09-270.023000
162024-12-300.054000
172020-06-150.020000
182016-12-280.134000
192017-12-260.004000
202018-12-240.030000
212021-06-220.020000
222021-09-210.120000
232023-06-210.030000
242025-12-300.060000
252016-09-130.120000