f/overrides/event-backup/hdrvx-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
22016-09-270.125000
32021-03-310.062000
42021-12-220.310000
52025-09-300.105000
62015-12-300.062000
72019-06-280.131000
82020-03-310.065000
92020-06-300.132000
102025-12-091.079000
112018-09-280.133000
122018-12-200.186000
132019-09-300.171000
142025-06-300.149000
152017-03-280.048000
162020-12-210.093000
172022-03-310.065000
182022-09-300.211000
192024-03-280.078000
202024-12-100.683000
212019-03-290.062000
222017-09-290.130000
232019-12-190.084000
242020-09-300.173000
252023-09-290.214000
262016-12-270.057000
272018-06-290.128000
282021-09-300.184000
292022-12-220.135000
302024-06-280.141000
312026-03-310.076000
322026-06-300.184000
332018-03-290.063000
342016-06-270.114000
352021-06-300.134000
362023-03-310.067000
372023-12-110.054000
382025-03-310.071000
392016-03-280.059000
402017-12-210.068000
412022-06-300.137000
422023-06-300.137000
432024-09-300.109000
442017-06-270.159000