f/overrides/event-backup/naarx-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

875 B

1DateDividends
22019-09-260.061000
32020-06-260.063000
42022-12-290.159000
52024-09-260.080000
62025-09-260.081000
72016-03-290.042000
82016-06-280.048000
92018-12-270.178000
102020-03-270.058000
112020-12-230.282000
122021-06-290.047000
132021-09-290.054000
142017-03-290.045000
152017-09-270.059000
162017-12-270.091000
172018-03-270.050000
182021-12-300.226000
192023-03-300.064000
202025-06-260.092000
212018-09-260.061000
222025-12-290.181000
232015-12-290.069000
242016-09-270.049000
252019-06-260.064000
262019-12-270.193000
272020-09-280.053000
282024-12-270.161000
292025-03-270.062000
302016-12-280.091000
312022-09-290.068000
322023-09-280.079000
332023-12-280.148000
342024-03-260.053000
352026-06-260.100000
362021-03-300.045000
372022-03-300.053000
382023-06-290.066000
392017-06-280.051000
402018-06-270.058000
412019-03-270.056000
422022-06-290.067000
432024-06-260.097000
442026-03-270.068000