f/overrides/event-backup/dfcfx-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
1997-06-10,0.134000
2000-06-08,0.148000
2017-03-30,0.023000
2017-06-29,0.030000
2019-03-28,0.049000
1999-09-08,0.133000
2007-03-08,0.072000
2016-12-15,0.028000
2012-03-08,0.006000
2013-09-10,0.007000
2018-09-27,0.050000
2019-12-17,0.046000
2025-06-27,0.104000
2003-12-22,0.267000
2014-12-16,0.027000
2006-06-08,0.078000
2008-03-10,0.062000
2009-06-09,0.054000
2011-03-08,0.009000
2026-03-30,0.075000
1997-03-10,0.093000
2001-03-08,0.088000
2022-09-29,0.042000
2006-09-08,0.083000
2020-06-29,0.022000
2008-09-09,0.067000
2003-09-09,0.032000
2007-09-10,0.124000
2011-09-08,0.012000
2023-03-30,0.053000
1998-03-10,0.093000
2002-06-10,0.080000
2015-12-16,0.042000
2022-06-29,0.026000
2024-03-27,0.096000
2024-12-13,0.119000
1998-12-21,0.193000
2007-06-08,0.123000
2003-06-10,0.047000
2004-06-08,0.038000
2006-12-18,0.157000
2019-09-27,0.058000
2025-03-28,0.089000
1996-12-27,0.204000
2001-09-10,0.103000
2016-09-29,0.015000
2018-06-28,0.037000
1998-09-09,0.140000
2005-09-08,0.050000
2013-03-08,0.004000
2018-12-18,0.067000
2000-03-08,0.093000
2000-12-18,0.210000
2009-09-09,0.035000
2016-03-30,0.018000
2023-12-13,0.095000
1997-09-09,0.140000
2007-12-19,0.158000
2023-06-29,0.080000
2025-09-29,0.104000
2003-03-10,0.027000
2014-06-09,0.004000
2010-12-09,0.070000
2001-06-08,0.132000
2008-12-10,0.107000
2017-09-28,0.031000
2023-09-28,0.101000
2022-03-30,0.009000
2000-09-08,0.139000
2013-06-10,0.006000
2016-06-29,0.018000
2020-12-16,0.002000
2002-09-10,0.080000
2011-06-08,0.012000
2010-09-08,0.019000
2004-03-09,0.009000
2004-09-08,0.041000
2014-03-10,0.002000
2015-09-09,0.014000
2020-03-30,0.037000
2005-03-08,0.020000
2009-03-10,0.033000
2026-06-29,0.089000
2022-12-14,0.048000
2024-06-27,0.127000
2012-06-08,0.008000
2025-12-15,0.104000
2014-09-09,0.005000
2015-03-09,0.005000
2004-12-20,0.087000
2012-09-10,0.011000
2021-12-15,0.002000
1999-06-08,0.138000
2005-12-19,0.110000
2001-12-17,0.135000
2002-03-08,0.050000
1997-12-22,0.228000
1999-03-09,0.072000
2024-09-27,0.129000
2008-06-10,0.063000
2012-12-13,0.059000
2011-12-13,0.080000
2015-06-08,0.011000
2018-03-28,0.031000
1999-12-20,0.172000
2009-12-09,0.036000
2002-12-16,0.341000
2020-09-29,0.005000
2013-12-12,0.020000
2019-06-27,0.069000
2006-03-08,0.039000
2017-12-15,0.037000
1996-09-10,0.126000
1998-06-09,0.135000
2005-06-08,0.084000