f/overrides/event-backup/dsdyx-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

795 B

1DateDividends
22021-12-220.913000
32025-09-300.108000
42014-12-310.775000
52018-09-280.185000
62014-09-300.115000
72015-09-300.112000
82018-12-310.615000
92020-12-300.499000
102025-06-300.099000
112013-12-300.306000
122014-06-300.107000
132023-12-200.363000
142024-06-280.063000
152026-06-300.104000
162015-06-300.066000
172021-09-300.058000
182018-06-290.016000
192022-03-310.095000
202022-12-210.631000
212024-09-300.064000
222024-12-310.557000
232013-09-300.093000
242018-03-290.014000
252017-06-300.094000
262017-12-290.291000
272020-03-310.041000
282020-06-300.041000
292022-09-300.128000
302024-03-280.043000
312014-03-310.121000
322015-12-310.208000
332025-03-310.084000
342026-03-310.034000
352015-03-310.218000
362025-12-310.440000
372019-12-310.110000
382021-03-310.257000
392016-12-300.518000
402017-03-310.211000