f/overrides/event-backup/mxsfx-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
22021-12-290.211000
32022-09-060.013000
42025-09-050.049000
52015-09-040.061000
62016-12-280.909000
72018-06-220.139000
82020-12-290.091000
92021-06-230.110000
102015-06-190.111000
112015-12-290.597000
122018-12-270.376000
132019-06-240.141000
142022-12-280.431000
152016-09-070.030000
162017-06-230.137000
172019-12-270.475000
182020-09-040.025000
192024-12-270.785000
202023-12-270.127000
212024-09-060.063000
222025-12-290.243000
232016-06-240.194000
242017-12-270.447000
252020-06-240.120000
262022-06-230.128000
272023-06-230.153000