f/overrides/event-backup/ngjfx-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
22023-09-290.127000
32021-06-300.173000
42021-09-300.241000
52022-10-130.315000
62020-09-300.104000
72022-09-300.146000
82023-06-300.160000
92020-12-300.354000
102021-12-300.669000
112024-06-280.158000
122020-06-300.102000
132023-12-280.155000
142025-03-310.113000
152025-06-300.171000
162025-12-300.221000
172018-09-280.084000
182019-06-280.183000
192020-03-310.080000
202026-06-300.227000
212021-03-310.103000
222022-12-290.299000
232024-09-300.109000
242019-12-160.724000
252020-10-140.055000
262023-03-310.120000
272024-03-280.133000
282025-09-300.130000
292018-06-290.241000
302018-12-280.242000
312019-03-290.119000
322026-03-310.125000
332021-12-151.931000
342022-03-310.110000
352024-12-300.211000
362022-06-300.127000
372018-12-170.177000
382019-09-300.102000
392019-12-300.994000