f/overrides/event-backup/cldax-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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Plaintext

Date,Dividends
2011-10-27,0.043000
2014-12-29,0.042000
2015-11-24,0.038000
2017-09-27,0.041000
2006-11-21,0.051000
2008-08-27,0.045000
2015-08-27,0.041000
2020-02-28,0.047000
2005-01-28,0.022000
2016-10-27,0.042000
2024-09-30,0.060000
2005-12-28,0.045000
2008-12-23,0.054000
2024-01-31,0.057000
2025-06-30,0.055000
2005-05-26,0.034000
2012-08-30,0.043000
2018-11-28,0.045000
2019-11-29,0.044000
2021-06-30,0.019000
2023-10-31,0.056000
2005-07-27,0.031000
2006-07-27,0.054000
2009-09-24,0.042000
2012-09-27,0.046000
2019-06-28,0.046000
2009-10-29,0.044000
2011-05-26,0.048000
2022-12-30,0.042000
2023-01-31,0.044000
2014-03-27,0.048000
2016-03-29,0.044000
2018-02-26,0.038000
2019-07-31,0.044000
2007-09-27,0.054000
2010-02-25,0.050000
2010-09-29,0.046000
2011-12-22,0.038000
2020-07-31,0.039000
2025-02-28,0.056000
2020-11-30,0.044000
2022-02-28,0.021000
2008-05-29,0.048000
2008-10-29,0.050000
2009-12-02,0.878000
2015-09-24,0.042000
2017-02-23,0.047000
2017-11-29,0.048000
2010-05-27,0.044000
2012-07-26,0.046000
2015-03-26,0.034000
2018-10-29,0.053000
2023-06-30,0.049000
2025-09-30,0.056000
2023-09-29,0.055000
2007-08-29,0.059000
2009-04-29,0.031000
2015-10-29,0.037000
2018-07-27,0.053000
2019-12-31,0.045000
2022-04-29,0.021000
2006-04-26,0.051000
2011-09-29,0.046000
2018-01-29,0.045000
2005-02-24,0.030000
2005-06-23,0.032000
2017-04-27,0.047000
2023-11-30,0.057000
2009-06-25,0.026000
2016-04-28,0.043000
2016-12-07,0.634000
2006-03-29,0.049000
2007-05-30,0.049000
2010-11-23,0.047000
2018-12-21,0.047000
2021-05-28,0.020000
2025-08-29,0.056000
2006-10-26,0.048000
2011-03-30,0.053000
2014-06-26,0.045000
2018-08-29,0.052000
2020-01-31,0.043000
2021-04-30,0.018000
2017-08-30,0.041000
2018-09-25,0.046000
2019-01-29,0.061000
2026-03-31,0.055000
2026-04-30,0.054000
2017-12-27,0.040000
2012-06-28,0.045000
2017-07-27,0.043000
2020-05-29,0.046000
2025-12-31,0.056000
2022-09-30,0.033000
2024-04-30,0.058000
2025-03-31,0.058000
2025-07-31,0.056000
2009-05-28,0.040000
2008-03-27,0.065000
2009-12-23,0.051000
2011-06-29,0.049000
2017-05-25,0.044000
2019-05-31,0.047000
2012-12-06,1.102000
2015-06-25,0.041000
2016-12-27,0.045000
2022-11-30,0.039000
2022-10-31,0.035000
2005-09-28,0.032000
2014-07-30,0.042000
2014-11-25,0.043000
2015-04-23,0.036000
2020-09-30,0.041000
2024-10-31,0.059000
2009-01-29,0.046000
2014-08-28,0.040000
2020-12-31,0.037000
2026-02-27,0.054000
2007-10-25,0.055000
2007-12-06,0.385000
2010-04-30,0.003000
2012-04-26,0.040000
2025-11-28,0.055000
2018-06-26,0.044000
2025-05-30,0.057000
2008-04-24,0.052000
2008-07-30,0.040000
2011-07-28,0.052000
2019-02-28,0.049000
2019-03-29,0.047000
2006-12-27,0.049000
2010-08-26,0.044000
2023-08-31,0.055000
2006-02-23,0.047000
2011-04-28,0.053000
2016-11-29,0.046000
2023-07-31,0.053000
2024-06-28,0.058000
2026-06-30,0.055000
2011-11-22,0.042000
2018-03-26,0.047000
2008-12-03,0.491000
2020-08-31,0.045000
2020-10-30,0.040000
2007-11-28,0.056000
2009-02-26,0.046000
2012-01-26,0.036000
2013-12-26,0.052000
2014-10-30,0.040000
2016-08-30,0.041000
2012-03-29,0.038000
2013-02-27,0.047000
2024-12-31,0.058000
2016-09-28,0.044000
2005-11-22,0.040000
2007-04-26,0.053000
2010-07-29,0.049000
2010-12-22,0.044000
2012-11-29,0.044000
2016-05-26,0.039000
2008-11-25,0.063000
2026-07-31,0.056000
2007-07-26,0.052000
2011-01-27,0.051000
2020-06-30,0.039000
2021-01-29,0.035000
2021-07-30,0.019000
2022-06-30,0.028000
2015-05-28,0.036000
2016-06-28,0.045000
2005-10-27,0.034000
2006-05-25,0.055000
2010-03-25,0.046000
2011-02-24,0.053000
2011-12-07,0.633000
2013-06-27,0.050000
2007-12-27,0.054000
2013-05-30,0.045000
2013-07-25,0.051000
2016-02-25,0.043000
2022-05-31,0.023000
2008-06-26,0.048000
2013-10-30,0.048000
2017-03-29,0.045000
2020-03-31,0.043000
2021-09-30,0.018000
2021-12-02,0.865000
2012-05-30,0.041000
2018-04-26,0.048000
2022-08-31,0.031000
2024-03-28,0.056000
2026-01-30,0.055000
2006-06-28,0.058000
2010-12-02,0.675000
2012-12-27,0.044000
2019-09-30,0.043000
2023-02-28,0.045000
2024-07-31,0.060000
2010-01-28,0.053000
2013-04-25,0.046000
2017-01-26,0.047000
2021-02-26,0.017000
2021-08-31,0.020000
2008-02-27,0.054000
2019-08-30,0.044000
2021-12-31,0.034000
2024-05-31,0.059000
2025-01-31,0.057000
2013-08-29,0.051000
2014-09-25,0.036000
2009-03-26,0.043000
2009-07-30,0.038000
2012-11-01,0.043000
2013-03-27,0.045000
2016-07-28,0.038000
2005-04-27,0.036000
2015-01-29,0.042000
2018-05-29,0.053000
2005-03-23,0.024000
2005-08-25,0.031000
2006-01-26,0.045000
2007-01-25,0.052000
2019-10-31,0.044000
2023-12-29,0.058000
2010-06-24,0.046000
2020-04-30,0.043000
2024-08-30,0.061000
2026-05-29,0.055000
2008-01-30,0.052000
2024-02-29,0.058000
2008-09-25,0.045000
2013-09-26,0.047000
2016-01-28,0.041000
2019-04-30,0.048000
2022-01-31,0.020000
2024-11-29,0.058000
2007-03-29,0.049000
2014-04-24,0.047000
2014-05-29,0.043000
2014-12-11,0.376000
2021-03-31,0.016000
2023-04-28,0.048000
2006-12-07,0.015000
2007-02-22,0.050000
2013-11-21,0.050000
2022-07-29,0.029000
2006-09-27,0.051000
2013-12-05,0.340000
2015-02-26,0.040000
2021-10-29,0.019000
2021-11-30,0.022000
2023-05-31,0.049000
2025-04-30,0.056000
2025-10-31,0.056000
2009-08-27,0.045000
2017-10-26,0.037000
2006-08-24,0.053000
2020-12-02,0.538000
2022-03-31,0.022000
2013-01-30,0.041000
2014-02-27,0.050000
2023-03-31,0.048000
2010-10-28,0.050000
2012-02-23,0.037000
2017-06-28,0.044000
2005-12-08,0.243000
2007-06-28,0.051000
2009-11-24,0.047000
2014-01-30,0.048000
2015-07-30,0.040000
2015-12-29,0.039000