f/overrides/event-backup/nwavx-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

455 B

1DateDividends
22023-03-130.031000
32024-09-090.039000
42025-12-180.506000
52021-03-080.003000
62023-12-200.036000
72024-12-192.040000
82026-03-180.120000
92021-12-210.071000
102022-03-070.013000
112022-12-210.108000
122023-09-110.007000
132025-09-080.068000
142021-06-070.012000
152021-09-070.013000
162021-12-290.009000
172022-06-060.068000
182022-09-120.073000
192023-06-120.013000
202024-06-100.018000
212025-03-100.005000
222025-06-090.067000
232026-06-170.069000