f/overrides/event-backup/gaozx-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

715 B

1DateDividends
22019-03-290.020000
32020-09-300.011000
42021-09-300.069000
52025-12-310.188000
62019-09-300.111000
72020-12-310.176000
82023-12-290.001000
92026-03-310.140000
102018-06-290.128000
112020-12-150.145000
122021-06-300.072000
132025-03-310.123000
142018-09-280.090000
152018-12-310.264000
162020-06-300.008000
172022-09-300.062000
182022-03-310.033000
192022-12-300.683000
202025-09-300.140000
212022-06-300.073000
222024-09-300.247000
232025-06-300.227000
242026-06-300.146000
252017-12-290.165000
262019-06-280.139000
272019-12-310.268000
282020-03-310.053000
292024-03-280.106000
302024-12-310.066000
312017-12-150.292000
322021-03-310.042000
332021-12-151.801000
342021-12-310.271000
352024-06-280.114000
362025-12-151.504000