f/overrides/event-backup/mdvzx-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
22024-12-120.716000
32019-09-160.033714
42021-06-150.061000
52023-09-130.042000
62024-06-130.049000
72024-09-120.050000
82025-12-160.703000
92019-06-170.025714
102020-12-150.069000
112021-09-140.014000
122022-09-130.046000
132024-03-130.044000
142025-09-250.044000
152020-09-150.023000
162021-12-140.626000
172023-12-130.598000
182025-03-270.041000
192025-06-260.046000
202022-12-130.756000
212026-03-260.053000
222026-06-250.050000
232019-03-150.021143
242019-12-160.298000
252020-03-160.032000
262020-06-150.044000
272022-06-140.013000