f/overrides/event-backup/cibr-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

715 B

1DateDividends
22022-06-240.003000
32023-06-270.053000
42017-09-210.007000
52021-12-230.281000
62026-06-250.072000
72018-12-180.039000
82020-03-260.399000
92019-06-140.018000
102019-12-130.047000
112025-03-270.004000
122026-03-260.110000
132017-06-220.010000
142018-06-210.008000
152018-03-220.005000
162020-09-240.033000
172020-12-240.027000
182024-06-270.066000
192024-12-130.081000
202025-09-250.001000
212015-12-230.103000
222017-12-210.005000
232025-12-120.208000
242025-06-260.090000
252021-06-240.033000
262024-09-260.011000
272022-12-230.095000
282023-12-220.166000
292024-03-210.024000
302016-06-220.015000
312019-09-250.004000
322020-06-250.030000
332022-03-250.020000
342023-09-220.009000
352016-09-210.006000
362016-12-210.020000