f/overrides/event-backup/mxiux-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

935 B

1DateDividends
22023-03-270.080000
32023-12-270.282000
42016-09-070.040000
52018-12-270.059000
62019-06-240.081000
72021-03-240.041000
82022-09-270.076000
92015-12-290.054000
102019-03-250.061000
112020-09-250.049000
122021-06-230.035000
132021-12-290.261000
142019-09-250.076000
152021-09-240.035000
162023-09-060.004000
172015-09-210.086000
182016-09-230.074000
192017-09-220.071000
202017-12-270.042000
212018-03-230.064000
222016-12-280.038000
232023-09-260.046000
242025-09-050.012000
252018-09-070.036000
262020-03-250.074000
272022-03-250.034000
282022-06-230.050000
292024-12-270.314000
302025-12-290.299000
312016-03-240.072000
322017-06-230.071000
332018-06-220.075000
342020-06-240.059000
352020-12-290.150000
362020-09-040.038000
372023-06-230.103000
382024-09-060.017000
392015-06-190.077000
402015-09-040.037000
412017-03-210.062000
422018-09-210.074000
432019-09-060.044000
442016-06-240.082000
452017-09-060.036000
462019-12-270.035000
472022-12-280.034000