f/overrides/event-backup/ccor-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

735 B

1DateDividends
22017-09-260.091000
32020-06-230.140000
42023-12-200.062000
52025-03-190.090000
62018-09-260.257000
72019-12-240.038000
82023-03-220.115000
92024-06-200.057000
102025-06-180.070000
112025-09-170.060000
122017-06-270.033000
132020-12-220.091000
142022-12-210.066000
152024-12-180.060000
162018-06-270.072000
172021-06-250.114000
182023-06-210.075000
192024-09-180.070000
202017-12-270.107000
212019-06-270.072000
222021-03-240.100000
232021-12-230.026000
242026-03-190.090000
252019-09-260.089000
262021-09-220.078000
272022-06-220.077000
282019-03-280.005000
292020-09-220.060000
302022-03-230.130000
312022-09-210.076000
322023-09-200.081000
332024-03-200.116000
342018-03-280.079000
352020-03-240.140000
362025-12-170.060000
372026-06-180.050000