f/overrides/event-backup/asvix-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
2016-12-13,0.424000
2025-03-25,0.010000
2009-12-29,0.024000
2010-09-21,0.027000
2013-12-06,1.593000
2017-12-26,0.010000
2018-09-18,0.013000
2019-09-17,0.014000
2000-06-30,0.014000
2005-03-15,0.014000
2016-09-20,0.006000
2021-12-21,0.784000
2024-03-19,0.017000
2008-12-09,0.016000
2011-06-14,0.003000
2011-09-20,0.028000
2006-03-14,0.013000
2008-12-29,0.038000
2015-09-08,0.009000
2015-12-08,1.033000
2016-06-21,0.045000
2000-09-29,0.009000
2002-12-06,0.320000
2004-12-28,0.006000
2023-06-20,0.023000
2006-12-12,1.333000
2011-12-27,0.035000
2022-12-21,0.258000
2023-03-21,0.021000
2025-09-23,0.025000
2004-03-16,0.015000
2004-12-07,0.946000
2005-09-13,0.034000
2024-09-17,0.024000
2000-12-08,0.212000
2003-03-18,0.021000
2018-12-20,0.011000
1999-03-26,0.016000
2008-09-16,0.036000
2012-12-26,0.057000
2020-06-16,0.015000
1999-06-25,0.017000
2004-06-15,0.006000
2012-12-07,0.386000
2018-06-19,0.024000
2021-06-22,0.002000
2006-12-27,0.042000
2012-09-18,0.017000
2014-12-23,0.036000
2014-12-09,1.213000
2015-12-28,0.012000
2017-06-20,0.015000
2009-06-16,0.081000
2010-12-28,0.035000
2012-06-12,0.043000
2014-09-09,0.018000
2019-06-18,0.014000
2021-03-23,0.007000
2022-03-22,0.035000
2001-03-30,0.018000
2007-12-28,0.043000
2009-09-15,0.012000
2023-09-19,0.028000
2025-06-24,0.022000
2007-09-11,0.020000
2007-12-11,1.831000
2008-06-17,0.034000
2017-09-19,0.002000
2017-12-12,1.230000
2020-12-22,0.003000
2022-06-21,0.016000
2024-12-17,0.650000
2000-03-31,0.018000
2013-09-10,0.020000
2013-12-23,0.018000
2025-12-16,1.188000
2018-12-11,1.163000
2020-09-22,0.012000
2005-12-06,1.338000
2005-12-28,0.015000
2011-12-09,0.596000
2015-06-09,0.012000
2016-12-27,0.005000
2018-12-31,0.011000
2021-09-21,0.011000
2022-09-20,0.020000
1999-12-10,0.022000
2013-03-12,0.007000
2013-06-11,0.047000
2023-12-19,0.031000
2024-06-18,0.033000
2007-06-12,0.023000
2019-12-20,0.163000
2001-12-07,0.191000
2003-06-17,0.010000
2003-12-31,0.020000