f/overrides/event-backup/efav-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

595 B

1DateDividends
22011-12-200.233000
32023-12-200.821000
42017-12-190.394000
52024-12-170.864000
62022-06-091.109000
72025-06-161.586000
82015-06-250.944000
92016-06-221.003000
102018-06-191.453000
112019-12-161.734000
122019-06-171.386000
132020-06-150.977000
142021-06-101.265000
152022-12-130.497000
162015-12-210.670000
172012-06-210.579000
182012-12-180.500000
192014-06-251.372000
202014-12-170.828000
212025-12-161.173000
222026-06-151.684000
232013-06-270.786000
242021-12-130.634000
252023-06-071.311000
262024-06-111.425000
272013-12-180.774000
282016-12-211.411000
292017-06-201.397000
302018-12-180.771000