f/overrides/event-backup/gsjy-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

515 B

1DateDividends
22016-12-220.322000
32018-12-240.675000
42019-06-240.255000
52020-09-240.029000
62022-06-240.298000
72016-09-230.052000
82017-03-240.002000
92017-09-220.003000
102018-06-250.271000
112021-09-240.049000
122023-06-260.304000
132026-06-240.412000
142017-06-230.226000
152020-12-240.292000
162021-06-240.222000
172021-12-270.366000
182023-12-260.441000
192024-06-240.298000
202025-12-230.659000
212016-06-230.196000
222017-12-210.342000
232019-12-240.670000
242022-12-270.345000
252024-12-230.321000
262025-06-240.266000