f/overrides/event-backup/hncax-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

535 B

1DateDividends
22022-12-280.102000
32023-12-270.071000
42024-12-270.009000
52025-12-110.072000
62009-12-220.150000
72013-12-300.086000
82014-12-300.025000
92020-12-100.582000
102025-12-290.142000
112002-12-230.007000
122003-11-100.053000
132018-12-170.974000
142016-12-280.141000
152017-12-270.080000
162018-12-270.077000
172019-12-270.082000
182021-12-100.062000
192005-11-100.138000
202006-12-200.014000
212012-12-200.086000
222021-12-290.035000
232011-12-220.076000
242015-12-290.083000
252005-12-210.049000
262006-11-101.358000
272007-11-142.406000