f/overrides/event-backup/cpdmx-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

1.0 KiB

1DateDividends
22015-03-270.048000
32015-06-260.372000
42017-03-280.039000
52023-03-290.049000
62023-09-270.062000
72014-03-280.040000
82015-12-220.453000
92019-03-270.043000
102020-03-270.041000
112022-03-290.037000
122022-06-280.417000
132023-06-280.234000
142026-03-270.075000
152014-06-260.711000
162016-09-270.036000
172018-12-210.309000
182019-12-200.397000
192024-09-260.063000
202024-12-200.358000
212025-06-260.331000
222016-12-220.143000
232019-09-260.056000
242020-06-260.385000
252022-12-210.073000
262024-03-260.073000
272024-06-260.084000
282016-03-280.042000
292017-12-210.433000
302021-03-290.065000
312025-03-270.048000
322025-09-260.064000
332017-06-270.278000
342018-06-270.421000
352018-09-260.046000
362020-12-210.182000
372023-12-210.098000
382025-12-190.126000
392014-09-290.038000
402015-09-280.039000
412019-06-260.210000
422020-09-280.046000
432021-06-280.867000
442021-09-280.058000
452026-06-260.409000
462022-09-280.039000
472013-09-260.046000
482013-12-230.437000
492014-12-220.575000
502016-06-280.301000
512017-09-270.044000
522018-03-270.036000
532021-12-220.575000