f/overrides/event-backup/nfty-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

555 B

1DateDividends
22020-12-240.013000
32013-09-200.551000
42021-12-230.500000
52024-12-130.761000
62017-12-210.542000
72021-06-240.018000
82022-09-230.225000
92016-09-211.006000
102019-06-140.048000
112019-09-250.187000
122022-03-251.295000
132025-12-120.721000
142014-09-230.189000
152020-06-250.127000
162012-09-210.692000
172017-09-210.928000
182021-03-250.136000
192023-06-270.018000
202024-03-210.079000
212024-06-270.061000
222015-09-231.249000
232020-03-260.093000
242022-12-231.054000
252023-03-240.053000
262019-03-210.106000
272021-09-230.077000
282026-03-260.305000