f/overrides/event-backup/aaaax-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

775 B

1DateDividends
22016-12-190.017000
32019-06-210.135000
42012-12-280.188000
52013-12-300.078000
62017-12-190.049000
72020-12-170.083000
82023-12-190.185000
92013-06-210.036000
102014-12-300.219000
112018-12-190.058000
122021-06-230.147000
132025-12-170.206000
142008-06-230.107000
152010-12-300.041000
162017-06-230.097000
172020-06-230.062000
182022-12-190.144000
192023-06-230.051000
202024-12-180.232000
212026-06-230.597000
222008-12-300.383000
232009-12-300.200000
242011-06-230.101000
252011-12-290.256000
262015-06-230.056000
272025-06-230.244000
282009-06-230.094000
292012-06-220.007000
302015-12-300.122000
312016-06-230.107000
322021-12-170.156000
332024-06-210.053000
342007-12-280.247000
352010-06-230.071000
362014-06-230.056000
372018-06-220.086000
382019-12-180.057000
392022-06-230.329000