f/overrides/event-backup/acio-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

615 B

1DateDividends
22021-06-150.026000
32022-03-150.052000
42023-06-280.064000
52019-09-170.143000
62021-09-140.059000
72019-12-300.195000
82022-12-280.069000
92024-09-270.043000
102024-12-300.034000
112020-06-160.048000
122021-03-160.067000
132022-09-130.070000
142025-03-280.050000
152020-03-170.101000
162020-09-150.066000
172020-12-290.068000
182022-12-060.193000
192024-03-260.053000
202024-06-270.047000
212026-03-300.065000
222021-12-290.046000
232022-06-140.051000
242023-09-270.052000
252023-12-270.069000
262025-06-270.052000
272025-09-290.027000
282026-06-290.048000
292022-12-290.069000
302023-03-290.053000
312025-12-300.034000