f/overrides/event-backup/calf-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

695 B

1DateDividends
22020-06-220.011000
32022-12-220.112000
42023-03-230.127000
52018-12-240.105000
62023-09-210.151000
72026-06-040.045000
82020-03-230.084000
92023-12-270.164000
102024-03-210.082000
112025-09-040.160000
122026-03-050.071000
132017-09-260.064000
142017-12-270.118000
152018-06-260.041000
162019-03-260.084000
172022-06-230.115000
182020-09-210.041000
192021-09-230.073000
202023-06-220.123000
212024-06-270.101000
222018-03-270.085000
232020-12-210.121000
242024-09-260.146000
252024-12-270.142000
262018-09-250.092000
272019-06-250.135000
282019-12-240.050000
292021-03-220.010000
302021-06-210.054000
312021-12-230.987000
322022-09-220.078000
332025-03-060.066000
342025-06-050.078000
352025-12-300.331000