f/overrides/event-backup/mveix-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
2003-09-30,0.037000
2012-03-15,0.029000
2014-06-16,0.030000
2026-06-26,0.026000
2024-09-26,0.028000
2007-06-29,0.050000
2010-12-15,0.007000
2011-03-15,0.020000
2011-12-15,0.033000
2012-12-17,0.051000
2013-09-16,0.021000
2020-06-15,0.029000
2004-03-31,0.033000
2013-06-17,0.029000
2016-09-15,0.020000
2017-03-15,0.020000
2023-06-28,0.017000
2006-03-31,0.042000
2006-06-30,0.037000
2008-06-16,0.032000
2009-03-13,0.031000
2015-09-15,0.053000
2023-12-28,0.014000
2026-03-27,0.021000
2003-03-31,0.037000
2008-09-15,0.033000
2014-03-17,0.043000
2019-03-15,0.014000
2021-03-29,0.009000
2021-09-29,0.018000
2024-06-26,0.017000
2004-06-30,0.035000
2013-03-15,0.035000
2013-12-16,0.364000
2018-09-17,0.013000
2021-12-29,1.599000
2006-09-29,0.047000
2007-03-30,0.050000
2016-03-15,0.030000
2019-09-16,0.030000
2021-06-29,0.019000
2025-09-26,0.023000
2005-12-30,0.148000
2016-06-15,0.016000
2020-03-16,0.037000
2025-12-29,0.477000
2003-06-30,0.035000
2005-06-30,0.022000
2012-09-17,0.034000
2014-12-15,1.967000
2015-03-16,0.052000
2015-12-15,4.242000
2005-03-31,0.024000
2017-06-15,0.028000
2004-12-31,0.020000
2017-12-15,0.561000
2018-06-15,0.019000
2019-06-17,0.018000
2022-09-28,0.001000
2007-12-31,0.025000
2008-03-14,0.035000
2011-09-15,0.024000
2018-03-15,0.023000
2019-12-16,0.362000
2025-06-26,0.027000
2003-12-31,0.038000
2005-09-30,0.030000
2009-09-15,0.007000
2015-06-15,0.021000
2023-03-28,0.012000
2012-06-15,0.031000
2016-12-15,0.280000
2017-09-15,0.154000
2025-03-27,0.025000
2007-09-28,0.030000
2008-12-15,0.032000
2014-09-15,0.041000
2020-12-29,3.367000
2022-06-28,0.001000
2023-09-27,0.012000
2024-12-27,0.752000
2004-09-30,0.029000
2018-12-17,1.148000
2020-09-28,0.021000
2022-12-28,0.422000
2024-03-27,0.013000