f/overrides/event-backup/ietc-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

675 B

1DateDividends
22019-03-200.049000
32021-12-130.279000
42025-03-180.063000
52018-06-260.053000
62020-03-250.073000
72022-06-090.054000
82023-03-230.128000
92023-12-200.134000
102019-09-240.053000
112022-12-130.172000
122024-06-110.089000
132018-12-170.188000
142020-12-140.055000
152021-03-250.060000
162022-03-240.063000
172023-06-070.069000
182024-03-210.078000
192021-06-100.046000
202023-09-260.160000
212026-03-170.075000
222019-06-170.047000
232020-06-150.051000
242020-09-230.047000
252022-09-260.085000
262026-06-150.110000
272021-09-240.060000
282024-09-250.160000
292025-06-160.086000
302018-09-260.052000
312019-12-160.109000
322024-12-170.115000
332025-09-160.102000
342025-12-160.132000