f/overrides/event-backup/esifx-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

895 B

1DateDividends
22020-09-090.036000
32021-03-090.035000
42022-03-090.034000
52016-12-130.067000
62017-06-090.044000
72019-12-170.239000
82020-06-090.040000
92020-08-180.105000
102022-09-090.042000
112024-03-110.046000
122026-03-100.045000
132017-07-260.037000
142021-09-090.029000
152022-12-090.447000
162024-12-100.576000
172025-06-100.049000
182017-03-090.042000
192018-03-090.038000
202019-06-110.040000
212024-06-110.044000
222020-12-100.100000
232023-03-090.045000
242024-09-100.051000
252025-03-110.047000
262026-06-090.050000
272019-03-110.038000
282020-03-100.044000
292022-06-090.038000
302025-12-090.532000
312017-09-110.042000
322018-12-110.408000
332019-08-080.045000
342023-06-090.043000
352023-09-110.046000
362023-12-110.105000
372018-08-090.035000
382018-09-110.045000
392019-09-100.040000
402021-06-090.033000
412021-12-090.882000
422016-09-090.035000
432017-12-120.290000
442018-06-110.042000
452025-09-090.047000