f/overrides/event-backup/cybax-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

253 lines
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Plaintext

Date,Dividends
2007-02-26,0.128000
2015-03-26,0.114000
2026-07-31,0.116000
2002-12-20,0.340000
2009-08-27,0.143000
2015-07-30,0.113000
2022-06-30,0.094000
2006-11-13,0.440000
2014-07-30,0.135000
2015-11-24,0.119000
2016-10-27,0.115000
2008-12-23,0.168000
2014-03-27,0.124000
2014-06-26,0.131000
2017-08-30,0.114000
2024-11-29,0.113000
2009-10-29,0.126000
2011-11-22,0.157000
2019-06-28,0.103000
2020-03-31,0.095000
2023-01-31,0.099000
2025-10-31,0.118000
2005-02-22,0.200000
2013-05-30,0.126000
2016-01-28,0.108000
2017-11-29,0.111000
2018-10-29,0.106000
2023-12-29,0.122000
2024-10-31,0.117000
2007-08-20,0.391000
2011-06-29,0.160000
2014-11-25,0.138000
2019-12-31,0.101000
2021-07-30,0.089000
2013-06-27,0.148000
2014-05-29,0.123000
2016-04-28,0.120000
2014-12-11,0.720000
2025-12-31,0.115000
2006-12-18,0.264000
2007-12-20,0.299000
2016-02-25,0.116000
2016-08-30,0.123000
2018-02-26,0.091000
2011-04-28,0.146000
2016-05-26,0.122000
2022-01-31,0.083000
2015-09-24,0.115000
2018-07-27,0.110000
2014-09-25,0.119000
2019-01-29,0.107000
2017-10-26,0.087000
2018-05-29,0.116000
2022-09-30,0.095000
2002-08-12,0.510000
2003-05-12,0.420000
2004-05-10,0.370000
2006-05-22,0.460000
2009-11-24,0.137000
2025-02-28,0.113000
2018-11-28,0.101000
2008-06-02,0.458000
2009-12-23,0.140000
2010-04-30,0.052000
2012-07-26,0.130000
2018-09-25,0.085000
2020-06-30,0.095000
2021-12-31,0.092000
2008-11-17,0.386000
2022-11-30,0.100000
2025-07-31,0.113000
2026-06-30,0.116000
2026-01-30,0.116000
2004-08-09,0.420000
2006-02-27,0.490000
2009-03-26,0.117000
2012-12-27,0.144000
2020-09-30,0.095000
2011-09-29,0.162000
2019-05-31,0.109000
2021-04-30,0.088000
2021-06-30,0.089000
2001-11-09,0.240000
2013-08-29,0.135000
2024-05-31,0.113000
2011-02-24,0.155000
2012-05-30,0.130000
2018-08-29,0.106000
2025-05-30,0.114000
2011-03-30,0.134000
2013-09-26,0.119000
2021-02-26,0.094000
2025-08-29,0.116000
2018-06-26,0.095000
2023-11-30,0.108000
2026-03-31,0.115000
2003-02-28,0.300000
2003-11-10,0.600000
2004-03-08,0.340000
2019-10-31,0.135000
2024-09-30,0.114000
2013-12-26,0.128000
2015-01-29,0.131000
2015-12-29,0.117000
2024-06-28,0.114000
2012-09-27,0.125000
2023-02-28,0.103000
2020-05-29,0.095000
2011-07-28,0.140000
2012-08-30,0.143000
2019-11-29,0.131000
2020-08-31,0.097000
2024-08-30,0.116000
2005-11-14,0.610000
2023-09-29,0.107000
2010-01-28,0.146000
2016-06-28,0.123000
2018-12-21,0.122000
2020-10-30,0.094000
2021-11-30,0.088000
2002-03-01,0.420000
2005-08-15,0.540000
2024-07-31,0.114000
2021-08-31,0.092000
2021-10-29,0.086000
2024-04-30,0.110000
2013-12-05,0.416000
2014-10-30,0.131000
2015-04-23,0.108000
2019-04-30,0.108000
2020-04-30,0.098000
2013-02-27,0.137000
2017-01-26,0.114000
2017-03-29,0.112000
2017-07-27,0.095000
2025-03-31,0.117000
2005-05-16,0.460000
2010-07-29,0.151000
2015-08-27,0.125000
2023-03-31,0.103000
2024-03-28,0.108000
2014-12-29,0.132000
2017-04-27,0.103000
2022-03-31,0.084000
2012-02-23,0.143000
2013-07-25,0.138000
2012-06-28,0.134000
2015-10-29,0.122000
2007-05-31,0.445000
2009-01-29,0.131000
2012-11-29,0.159000
2016-12-27,0.109000
2025-04-30,0.115000
2008-08-18,0.380000
2011-05-26,0.136000
2018-04-26,0.104000
2020-01-31,0.099000
2024-01-31,0.105000
2009-06-25,0.101000
2011-01-27,0.141000
2019-02-28,0.104000
2002-05-13,0.450000
2017-09-27,0.102000
2017-12-27,0.096000
2004-12-20,0.280000
2008-03-03,0.299000
2025-09-30,0.115000
2025-06-30,0.114000
2001-08-13,0.200000
2002-11-11,0.540000
2003-12-19,0.330000
2012-11-01,0.135000
2022-02-28,0.086000
2009-02-26,0.083000
2015-05-28,0.102000
2023-04-28,0.096000
2025-11-28,0.114000
2010-02-25,0.149000
2011-10-27,0.158000
2013-10-30,0.124000
2022-10-31,0.095000
2023-06-30,0.105000
2009-07-30,0.128000
2010-06-24,0.154000
2011-08-25,0.153000
2013-03-27,0.150000
2020-02-28,0.098000
2022-12-30,0.101000
2009-05-28,0.123000
2013-04-25,0.129000
2022-07-29,0.088000
2023-07-31,0.099000
2025-01-31,0.113000
2003-08-11,0.540000
2010-03-25,0.142000
2010-10-28,0.152000
2019-07-31,0.101000
2020-11-30,0.110000
2026-05-29,0.116000
2006-08-14,0.350000
2007-11-12,0.404000
2009-09-24,0.122000
2015-02-26,0.101000
2016-03-29,0.106000
2021-03-31,0.094000
2001-12-19,0.450000
2010-08-26,0.151000
2012-04-26,0.139000
2017-06-28,0.104000
2017-05-25,0.094000
2022-05-31,0.089000
2010-05-27,0.159000
2016-11-29,0.113000
2018-01-29,0.104000
2021-09-30,0.087000
2012-03-29,0.139000
2014-01-30,0.118000
2014-08-28,0.132000
2022-04-29,0.086000
2026-04-30,0.115000
2024-02-29,0.106000
2005-12-19,0.100000
2013-11-21,0.132000
2020-07-31,0.097000
2020-12-31,0.098000
2021-05-28,0.093000
2023-05-31,0.103000
2023-10-31,0.107000
2010-11-23,0.153000
2012-01-26,0.138000
2013-01-30,0.123000
2014-02-27,0.130000
2019-08-30,0.100000
2009-04-29,0.101000
2016-09-28,0.120000
2018-03-26,0.102000
2026-02-27,0.114000
2023-08-31,0.106000
2011-12-22,0.142000
2014-04-24,0.138000
2016-07-28,0.117000
2017-02-23,0.116000
2019-03-29,0.105000
2004-11-08,0.350000
2010-12-22,0.155000
2015-06-25,0.111000
2021-01-29,0.094000
2022-08-31,0.095000
2010-09-29,0.146000
2019-09-30,0.096000
2024-12-31,0.121000