f/overrides/event-backup/nifix-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

895 B

1DateDividends
22014-06-130.016000
32017-12-180.061000
42019-01-280.111000
52019-12-180.018000
62020-03-090.015000
72022-09-120.256000
82025-12-180.076000
92024-06-100.182000
102018-12-180.070000
112019-02-260.113000
122019-06-070.081000
132019-09-090.076000
142022-12-290.015000
152023-06-120.161000
162023-12-200.092000
172021-12-290.041000
182022-03-070.096000
192014-12-160.012000
202022-06-060.234000
212024-09-090.084000
222017-03-100.009000
232017-09-110.078000
242018-06-080.060000
252019-03-260.119000
262022-12-210.033000
272023-09-110.113000
282024-12-190.039000
292014-09-160.035000
302021-03-080.023000
312021-06-070.065000
322021-09-070.142000
332023-03-130.019000
342025-09-080.106000
352026-03-180.041000
362026-06-170.203000
372012-12-190.008000
382018-09-100.060000
392020-06-080.061000
402020-12-210.063000
412024-03-110.011000
422025-03-100.066000
432025-06-090.147000
442017-06-090.038000
452021-12-210.358000