f/overrides/event-backup/hstrx-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
2003-12-31,0.045000
2004-12-31,0.060000
2005-11-18,0.295000
2005-12-30,0.110000
2008-06-30,0.040000
2013-06-28,0.033000
2013-12-31,0.014000
2014-12-31,0.020000
2008-09-30,0.050000
2011-09-30,0.017000
2012-09-28,0.007000
2014-03-31,0.050000
2016-03-31,0.010000
2023-12-29,0.096000
2006-03-31,0.028000
2007-03-30,0.050000
2009-09-30,0.030000
2012-03-30,0.018000
2017-12-29,0.021000
2019-12-31,0.041000
2023-03-31,0.064000
2025-03-31,0.111000
2025-12-31,0.115000
2010-06-30,0.035000
2010-12-31,0.050000
2011-06-30,0.029000
2012-12-31,0.020000
2021-06-30,0.052000
2022-09-30,0.084000
2022-12-30,0.063000
2025-06-30,0.120000
2006-06-30,0.120000
2015-09-30,0.010000
2018-12-31,0.040000
2021-09-30,0.060000
2024-09-30,0.108000
2026-03-31,0.068000
2003-06-30,0.070000
2004-11-19,0.022000
2006-11-17,0.427000
2011-11-18,0.230000
2021-03-31,0.039000
2022-06-30,0.079000
2010-11-19,0.538000
2012-06-29,0.019000
2012-11-16,0.266000
2014-06-30,0.040000
2018-06-29,0.037000
2020-06-30,0.013000
2020-12-31,0.014000
2004-09-30,0.048000
2005-09-30,0.050000
2007-11-09,0.538000
2008-11-14,0.488000
2013-03-28,0.035000
2021-12-31,0.044000
2024-12-31,0.085000
2025-09-30,0.110000
2007-06-29,0.180000
2009-11-20,0.171000
2019-03-29,0.039000
2003-03-31,0.028000
2004-03-31,0.020000
2004-06-30,0.083000
2014-09-30,0.056000
2015-06-30,0.010000
2019-09-30,0.037000
2020-03-31,0.023000
2024-03-28,0.053000
2013-09-30,0.037000
2020-09-30,0.026000
2022-03-31,0.063000
2023-09-29,0.094000
2026-06-30,0.245000
2010-09-30,0.030000
2017-09-29,0.014000
2005-03-31,0.025000
2005-06-30,0.107000
2007-09-28,0.090000
2015-03-31,0.007000
2018-09-28,0.041000
2007-12-31,0.050000
2008-03-31,0.050000
2009-12-31,0.066000
2011-03-31,0.010000
2023-06-30,0.101000
2003-09-30,0.063000
2006-09-29,0.100000
2010-03-31,0.030000
2011-12-30,0.020000
2015-12-31,0.020000
2016-06-30,0.005000
2016-09-30,0.015000
2017-06-30,0.010000
2018-03-29,0.027000
2019-06-28,0.054000
2024-06-28,0.172000