f/overrides/event-backup/igro-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

855 B

1DateDividends
22022-12-130.244000
32017-03-240.317000
42019-12-160.230000
52021-03-250.395000
62022-06-090.576000
72026-03-170.297000
82016-12-210.157000
92017-09-260.220000
102020-09-230.374000
112024-09-250.403000
122016-06-210.182000
132018-12-180.222000
142021-06-100.563000
152021-09-240.302000
162023-09-260.443000
172016-09-260.239000
182018-03-220.290000
192018-09-260.229000
202020-12-140.325000
212023-03-230.245000
222023-06-070.659000
232023-12-200.456000
242025-09-160.433000
252017-12-210.307000
262019-06-170.744000
272021-12-130.280000
282022-03-240.322000
292022-09-260.376000
302024-03-210.299000
312017-06-200.597000
322019-03-200.345000
332019-09-240.277000
342020-06-150.452000
352025-03-180.272000
362025-12-150.497000
372026-06-151.194000
382018-06-190.722000
392022-12-290.034000
402024-06-110.626000
412024-12-170.329000
422020-03-250.371000
432025-06-160.874000