f/overrides/event-backup/jsvux-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
2005-06-30,0.086000
2015-06-26,0.049000
2025-12-18,0.102000
2007-03-30,0.069000
2014-12-19,0.116000
2019-03-27,0.036000
2020-09-28,0.066000
2017-06-28,0.037000
2018-03-27,0.003000
2024-12-19,0.106000
2005-09-30,0.047000
2006-06-30,0.063000
2015-12-11,1.092000
2015-12-21,0.111000
2018-12-19,0.123000
2023-03-29,0.048000
2016-09-28,0.078000
2022-06-28,0.085000
2022-09-28,0.094000
2024-09-26,0.109000
2025-09-26,0.104000
2012-09-28,0.021000
2013-12-20,0.104000
2015-03-27,0.112000
2019-12-19,0.135000
2021-06-28,0.049000
2023-09-27,0.177000
2011-09-30,0.041000
2017-12-13,1.739000
2017-12-20,0.173000
2018-09-26,0.083000
2019-12-12,1.332000
2026-06-26,0.075000
2023-06-28,0.083000
2025-06-26,0.087000
2006-03-31,0.047000
2007-12-20,0.065000
2009-03-31,0.157000
2009-09-30,0.018000
2012-06-29,0.071000
2018-06-27,0.096000
2025-03-27,0.024000
2005-12-30,0.067000
2007-06-29,0.066000
2017-09-27,0.076000
2019-09-26,0.080000
2020-06-26,0.078000
2022-12-13,2.031000
2010-03-31,0.044000
2014-06-30,0.068000
2022-03-29,0.003000
2025-12-11,2.368000
2021-12-20,0.090000
2006-09-29,0.034000
2008-06-30,0.065000
2009-06-30,0.046000
2011-03-31,0.092000
2014-09-30,0.035000
2015-09-28,0.071000
2005-12-15,4.195000
2008-09-30,0.043000
2009-12-21,0.037000
2021-09-28,0.067000
2022-12-20,0.134000
2007-09-28,0.010000
2010-09-30,0.028000
2011-06-30,0.052000
2016-12-14,0.019000
2019-06-26,0.113000
2021-03-29,0.005000
2023-12-20,0.134000
2024-03-26,0.030000
2008-03-31,0.089000
2010-06-30,0.040000
2011-12-20,0.062000
2013-12-12,0.668000
2020-12-30,0.009000
2021-12-13,4.874000
2023-12-13,0.036000
2024-06-26,0.076000
2007-12-17,2.513000
2008-12-18,1.034000
2012-03-30,0.054000
2012-12-18,0.089000
2013-06-28,0.079000
2020-12-18,0.102000
2016-12-20,0.114000
2018-12-12,3.457000
2006-12-15,2.999000
2006-12-22,0.061000
2013-03-28,0.113000
2013-09-30,0.032000
2014-12-12,1.341000
2016-06-28,0.080000
2024-12-12,1.624000