f/overrides/event-backup/mxccx-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
1998-12-16,0.017000
2004-06-24,0.016000
2023-12-15,0.016000
2001-12-24,0.008000
2007-03-26,0.031000
2015-03-24,0.024000
2008-06-24,0.032000
2017-09-25,0.018000
2008-09-24,0.044000
2011-03-24,0.015000
2012-03-26,0.022000
2013-03-25,0.022000
2017-12-05,3.087000
2004-09-24,0.023000
2010-03-24,0.016000
2017-12-18,0.032000
2023-03-15,0.002000
1998-06-24,0.032000
1998-11-20,0.220000
2006-03-24,0.029000
2007-06-25,0.038000
2002-07-31,0.001000
2002-09-24,0.016000
2002-10-31,0.001000
2003-03-24,0.025000
2009-03-24,0.037000
1999-12-20,0.011000
2012-09-24,0.022000
2013-12-05,1.358000
2020-03-24,0.014000
2009-12-24,0.025000
2011-09-26,0.022000
2012-12-20,0.048000
2017-06-26,0.011000
2022-12-19,0.002000
2009-09-24,0.015000
2014-12-18,0.032000
2015-09-24,0.031000
2020-06-24,0.007000
2025-12-15,0.608000
1999-11-19,0.253000
2019-09-24,0.007000
2016-12-05,2.198000
1997-12-16,0.052000
1998-09-24,0.028000
2000-12-26,0.014000
2008-03-24,0.039000
2009-06-24,0.025000
2012-06-25,0.026000
2012-12-06,1.122000
2020-12-04,1.990000
2015-12-18,0.035000
2018-03-26,0.014000
2018-06-25,0.012000
2011-12-06,0.256000
2016-12-19,0.040000
2017-03-24,0.019000
2018-09-24,0.007000
2005-12-27,0.054000
2013-09-24,0.022000
2014-03-24,0.021000
2015-06-24,0.021000
2019-12-18,0.023000
2021-12-20,0.014000
2000-03-24,0.001000
2008-12-08,4.377000
2013-06-24,0.023000
2021-12-06,1.533000
2003-06-24,0.017000
2003-09-24,0.024000
2003-12-24,0.025000
2002-03-25,0.007000
2002-12-26,0.021000
2006-12-26,0.051000
2019-06-24,0.006000
2019-12-05,1.368000
1999-09-24,0.011000
2006-11-27,2.002000
2021-03-24,0.002000
2023-06-15,0.008000
2001-06-25,0.001000
2005-09-26,0.033000
2007-12-24,0.050000
2010-06-24,0.016000
2011-06-24,0.017000
2016-03-24,0.032000
2016-06-24,0.018000
2004-03-24,0.013000
2007-11-26,3.207000
2013-12-19,0.030000
2024-03-15,0.002000
2024-12-16,0.008000
1999-03-24,0.017000
2001-09-24,0.005000
2005-11-23,0.523000
2010-12-27,0.021000
2011-12-22,0.021000
2015-12-03,1.836000
2018-12-18,0.033000
2010-09-24,0.022000
2020-12-18,0.014000
2022-06-24,0.004000
2005-06-24,0.034000
2007-09-24,0.043000
2005-03-24,0.017000
2006-06-26,0.034000
2014-09-24,0.018000
2019-03-25,0.012000
2020-09-24,0.006000
2022-12-07,1.061000
2023-09-15,0.004000
2006-09-25,0.038000
2008-12-24,0.057000
2009-12-07,0.591000
2018-12-06,3.861000
2023-12-12,1.518000
1998-03-24,0.037000
2002-06-28,0.001000
2010-12-06,0.635000
1999-06-24,0.015000
2014-06-24,0.022000
2014-12-04,1.724000
2016-09-26,0.026000
2004-12-27,0.096000
2024-12-12,0.902000