f/overrides/event-backup/mxayx-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

535 B

1DateDividends
22017-12-280.356000
32022-06-270.085000
42022-09-080.566000
52023-09-080.207000
62025-09-090.212000
72018-12-280.444000
82019-06-260.093000
92021-09-070.381000
102022-12-290.281000
112023-12-280.277000
122024-12-300.351000
132021-06-250.066000
142021-12-300.705000
152016-12-290.159000
162017-06-270.074000
172017-09-080.049000
182018-06-270.092000
192019-09-100.601000
202020-06-260.076000
212024-09-100.263000
222025-12-300.310000
232018-09-110.231000
242019-12-300.238000
252020-09-080.312000
262020-12-300.302000
272023-06-270.105000