f/overrides/event-backup/gobsx-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
2015-12-22,0.063000
2007-04-30,0.039000
2015-03-31,0.075000
2012-03-30,0.035000
2012-09-28,0.033000
2014-09-30,0.089000
2014-12-23,0.251000
2017-09-29,0.085000
2009-01-30,0.038000
2009-11-30,0.044000
2007-10-31,0.044000
2022-03-31,0.030000
2025-03-31,0.140000
2017-12-21,0.386000
2022-09-30,0.123000
2008-11-28,0.041000
2009-02-27,0.039000
2009-08-31,0.044000
2013-02-28,0.026000
2008-08-29,0.046000
2008-10-31,0.043000
2010-05-28,0.039000
2013-03-28,0.027000
2010-12-09,0.128000
2022-12-20,0.379000
2012-06-29,0.029000
2014-02-28,0.031000
2018-03-28,0.078000
2007-12-31,0.042000
2011-02-28,0.036000
2011-10-31,0.030000
2012-11-30,0.031000
2013-05-31,0.026000
2018-06-28,0.086000
2019-06-28,0.087000
2025-06-30,0.023000
2010-07-30,0.041000
2010-12-23,0.210000
2021-12-20,0.147000
2025-12-19,0.117000
2012-02-29,0.031000
2013-07-31,0.029000
2009-12-31,0.055000
2010-08-31,0.042000
2026-06-30,0.121000
2007-08-31,0.040000
2009-07-31,0.044000
2013-09-30,0.033000
2021-03-31,0.008000
2008-07-31,0.047000
2011-08-31,0.037000
2006-12-29,0.032000
2010-06-30,0.039000
2014-06-27,0.075000
2008-02-29,0.041000
2012-08-31,0.030000
2024-12-20,0.076000
2011-06-15,0.018000
2012-07-31,0.030000
2011-07-29,0.037000
2012-05-31,0.030000
2021-06-30,0.081000
2023-12-19,0.008000
2006-11-30,0.028000
2008-01-31,0.043000
2010-11-30,0.040000
2018-09-27,0.092000
2014-12-10,0.027000
2020-03-31,0.037000
2021-09-30,0.018000
2008-04-30,0.046000
2011-12-30,0.029000
2010-12-31,0.041000
2011-03-31,0.039000
2011-04-29,0.040000
2012-12-31,0.032000
2013-06-28,0.025000
2013-10-31,0.034000
2008-06-30,0.047000
2008-09-30,0.044000
2024-06-28,0.137000
2017-06-30,0.036000
2019-09-30,0.036000
2015-06-24,0.034000
2009-12-10,0.052000
2012-12-12,0.155000
2016-12-22,0.188000
2018-12-20,0.133000
2009-10-30,0.044000
2012-06-19,0.019000
2011-01-31,0.040000
2011-05-31,0.036000
2013-12-31,0.034000
2007-06-29,0.039000
2009-09-30,0.044000
2019-03-29,0.043000
2025-09-30,0.101000
2007-11-30,0.043000
2012-04-30,0.030000
2009-06-30,0.044000
2010-01-29,0.040000
2010-09-30,0.039000
2013-06-18,0.111000
2013-08-30,0.034000
2008-05-30,0.046000
2009-03-31,0.042000
2007-09-28,0.041000
2008-12-31,0.158000
2010-02-26,0.038000
2013-04-30,0.027000
2014-03-31,0.037000
2007-02-28,0.035000
2007-03-30,0.038000
2024-03-28,0.048000
2010-03-31,0.039000
2011-12-09,0.127000
2017-03-31,0.017000
2026-03-31,0.121000
2007-07-31,0.042000
2013-11-29,0.033000
2012-01-31,0.029000
2022-06-30,0.054000
2011-09-30,0.032000
2011-11-30,0.029000
2012-10-31,0.034000
2014-01-31,0.033000
2024-09-30,0.051000
2007-01-31,0.037000
2008-03-31,0.044000
2011-06-30,0.035000
2015-06-30,0.083000
2009-04-30,0.042000
2009-05-29,0.044000
2013-01-31,0.031000
2007-05-31,0.042000
2010-10-29,0.040000