f/overrides/event-backup/cmgyx-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

295 B

1DateDividends
22011-12-060.826000
32012-12-070.766000
42014-12-045.080000
52017-12-063.609000
62020-12-104.645000
72013-12-053.146000
82018-12-065.482000
92021-12-106.108000
102009-12-070.033000
112015-12-034.516000
122016-12-071.554000
132019-12-122.138000
142024-12-113.555000
152025-12-103.413000