f/overrides/event-backup/mrgax-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

615 B

1DateDividends
22006-12-121.386000
32018-12-112.977000
42025-12-166.792000
52008-12-110.085000
62015-12-102.730000
72016-12-130.971000
81998-12-100.631000
92002-01-310.261000
102007-12-111.465000
112014-12-112.276000
122017-12-122.106000
132023-12-121.152000
141997-03-270.009000
152010-04-300.013000
162012-12-110.108000
172020-12-080.627000
181997-06-260.020000
191999-12-101.334000
202019-12-100.636000
212021-12-073.462000
222022-12-061.452000
232024-12-174.150000
241997-12-230.545000
252010-12-090.109000
262013-12-100.168000
271996-12-230.073000
281997-09-260.025000
292009-12-100.122000
302005-12-080.803000
312011-12-080.103000