f/overrides/event-backup/lyb-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

1.2 KiB

1DateDividends
22021-06-041.130000
32023-03-031.190000
42025-03-101.340000
52011-11-224.750000
62015-08-210.780000
72015-11-190.780000
82017-03-020.850000
92019-03-011.000000
102018-03-021.000000
112025-12-011.370000
122013-02-210.400000
132018-09-041.000000
142022-11-251.190000
152026-06-010.690000
162016-02-250.780000
172026-03-020.690000
182011-05-030.100000
192012-03-080.250000
202013-05-300.500000
212013-11-210.600000
222024-08-261.340000
232023-08-251.250000
242024-12-021.340000
252014-08-210.700000
262014-11-200.700000
272017-06-010.900000
282017-09-010.900000
292019-06-071.050000
302022-06-036.390000
312024-03-011.250000
322013-09-190.500000
332016-05-200.850000
342016-08-120.850000
352016-11-250.850000
362020-08-281.050000
372019-11-291.050000
382020-06-051.050000
392012-11-153.150000
402018-12-071.000000
412022-03-041.130000
422023-11-241.250000
432012-05-170.400000
442021-08-271.130000
452023-05-261.250000
462017-12-040.900000
472020-11-271.050000
482022-08-261.190000
492024-06-031.340000
502014-02-270.600000
512015-02-260.700000
522018-06-081.000000
532014-04-240.700000
542021-03-051.050000
552011-08-150.200000
562012-08-300.400000
572019-09-031.050000
582025-08-251.370000
592026-08-240.690000
602020-02-281.050000
612021-11-261.130000
622025-06-021.370000