f/overrides/event-backup/lemb-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

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Date,Dividends
2012-04-02,0.205000
2013-03-01,0.170000
2013-04-01,0.106000
2013-07-01,0.094000
2014-04-01,0.100000
2019-12-19,1.927000
2011-12-01,0.150000
2012-03-01,0.159000
2014-11-03,0.168000
2014-12-01,0.168000
2018-12-03,1.489000
2018-12-18,1.489000
2012-06-01,0.178000
2014-10-01,0.150000
2013-02-01,0.176000
2013-08-01,0.094000
2013-09-03,0.096000
2014-03-03,0.140000
2014-05-01,0.101000
2014-06-02,0.084000
2011-12-27,0.241000
2012-10-01,0.123000
2022-12-15,0.300000
2015-03-02,0.069000
2015-07-01,0.016000
2013-12-26,0.082000
2015-05-01,0.030000
2015-06-01,0.022000
2021-12-16,1.526000
2012-05-01,0.195000
2013-12-02,0.140000
2013-05-01,0.128000
2013-06-03,0.109000
2013-10-01,0.126000
2013-11-01,0.140000
2014-07-01,0.080000
2014-09-02,0.150000
2012-07-02,0.153000
2012-12-03,0.032000
2025-12-19,1.015000
2014-02-03,0.140000
2015-02-02,0.090000
2012-09-04,0.137000
2014-08-01,0.035000
2015-04-01,0.032000
2023-12-14,0.492000
2012-02-01,0.206000
2012-08-01,0.163000
2012-12-26,0.187000