f/overrides/event-backup/cbsax-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

375 B

1DateDividends
22024-12-113.472000
32018-12-065.412000
42019-12-122.138000
52021-12-106.039000
62013-12-053.075000
72014-12-044.988000
82015-12-034.376000
92010-04-260.041000
102012-12-070.766000
112016-12-071.520000
122017-12-063.506000
132020-12-104.557000
142005-12-150.310000
152006-12-111.463000
162008-12-080.490000
172025-12-103.323000
182007-12-103.858000
192011-12-060.826000