f/overrides/event-backup/gsid-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
22026-03-250.239000
32026-06-240.899000
42020-09-240.219000
52022-06-240.668000
62023-09-250.132000
72023-12-260.200000
82024-03-220.237000
92024-09-240.342000
102025-06-240.868000
112025-12-230.355000
122020-12-240.318000
132021-09-240.593000
142021-12-270.296000
152022-03-250.224000
162022-09-260.085000
172025-03-250.239000
182023-03-270.242000
192023-06-260.821000
202024-06-240.703000
212021-03-250.216000
222021-06-240.550000
232022-12-270.229000
242024-12-230.291000
252025-09-240.368000