f/overrides/event-backup/cnp-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

233 lines
4.5 KiB
Plaintext

Date,Dividends
1979-01-22,0.165790
1987-11-09,0.303480
2014-05-14,0.238000
1994-02-10,0.316125
2002-08-15,0.134880
2011-05-12,0.198000
1970-08-10,0.084300
1986-02-10,0.278190
2006-08-14,0.150000
2007-11-14,0.170000
2023-08-16,0.190000
1981-02-09,0.207940
2005-11-14,0.060000
2021-11-17,0.170000
1989-11-10,0.311910
2003-08-13,0.100000
2007-05-14,0.170000
2010-02-11,0.195000
2026-08-20,0.240000
1971-11-08,0.092730
1984-02-09,0.244470
2001-05-14,0.316125
2003-05-15,0.100000
2011-11-14,0.198000
2013-02-13,0.207000
2025-08-21,0.220000
1970-02-06,0.084300
2015-08-12,0.248000
2020-02-19,0.290000
1972-02-14,0.095540
1980-05-09,0.188270
1986-11-07,0.295050
1989-05-10,0.311910
2000-05-12,0.316125
2012-02-14,0.203000
2012-05-14,0.203000
1982-05-11,0.227610
2017-02-14,0.268000
2000-02-14,0.316125
1983-08-10,0.244470
2014-02-12,0.238000
1992-11-09,0.316125
2008-08-13,0.183000
1975-08-11,0.109590
1990-05-10,0.311910
1993-02-09,0.316125
2014-11-12,0.238000
1971-05-10,0.092730
1974-08-12,0.103970
1978-11-13,0.148930
2000-08-14,0.316125
2024-05-15,0.200000
1984-08-10,0.261330
1995-11-14,0.316125
2009-08-12,0.190000
2018-05-16,0.278000
2023-11-15,0.200000
1971-02-05,0.084300
1975-05-12,0.109590
2011-02-14,0.198000
2016-11-14,0.258000
2026-02-19,0.230000
2004-05-20,0.100000
2020-05-20,0.150000
2007-02-14,0.170000
1981-11-09,0.210750
1991-02-11,0.311910
1993-11-09,0.316125
1996-08-14,0.316125
1998-11-12,0.316125
2021-05-19,0.160000
2024-11-21,0.210000
1972-05-15,0.095540
1983-11-09,0.244470
1994-09-09,0.316125
2003-11-13,0.100000
2005-03-14,0.100000
2022-02-16,0.170000
1972-08-14,0.095540
1980-08-11,0.188270
1988-02-09,0.303480
1990-08-10,0.311910
2002-10-01,0.843000
2013-11-13,0.207000
2024-02-14,0.200000
1973-01-29,0.098350
1977-11-14,0.137690
1979-08-13,0.165790
1996-02-14,0.316125
2010-05-12,0.195000
1976-02-06,0.109590
1977-08-08,0.137690
1985-05-10,0.278190
1997-08-13,0.316125
2015-02-11,0.247000
1976-05-10,0.109590
1981-05-19,0.140500
1982-11-09,0.227610
1991-11-08,0.311910
1992-08-10,0.316125
1997-11-12,0.316125
2012-11-14,0.203000
2019-05-15,0.288000
2020-11-18,0.150000
1994-08-10,0.316125
2017-11-15,0.268000
2019-11-20,0.288000
1991-08-12,0.311910
2013-05-14,0.207000
2022-05-18,0.170000
2022-11-16,0.180000
1998-02-11,0.316125
2002-11-13,0.160000
2025-11-20,0.220000
1998-05-13,0.316125
1970-05-11,0.084300
2002-05-14,0.316125
2016-08-12,0.258000
2025-05-15,0.220000
2003-03-10,0.100000
2013-08-14,0.207000
1973-05-14,0.098350
2005-06-13,0.070000
1985-08-12,0.278190
2001-11-14,0.316125
2007-08-14,0.170000
2019-02-20,0.288000
2021-08-18,0.160000
2023-02-15,0.190000
1995-08-14,0.316125
1997-02-12,0.316125
2003-01-07,0.493000
2012-08-14,0.203000
1977-05-09,0.123640
1979-05-14,0.165790
1987-05-11,0.303480
2022-08-17,0.180000
2023-05-17,0.190000
1984-11-09,0.261330
1992-05-11,0.311910
2005-09-08,0.070000
2006-05-12,0.150000
2021-02-17,0.160000
1971-08-09,0.092730
1973-11-12,0.098350
1983-02-10,0.227610
2009-02-11,0.190000
2009-05-13,0.190000
2024-08-15,0.200000
2017-05-12,0.268000
1980-11-07,0.188270
1984-05-10,0.261330
1972-11-13,0.095540
1995-02-10,0.316125
2008-02-13,0.183000
2006-11-14,0.150000
2008-05-14,0.183000
2014-08-13,0.238000
2016-02-11,0.258000
2016-05-12,0.258000
1985-02-08,0.261330
2009-11-12,0.190000
1973-08-13,0.098350
2002-02-14,0.316125
2004-02-11,0.100000
2018-11-14,0.278000
1980-02-08,0.188270
1988-11-09,0.311910
1989-08-10,0.311910
1994-11-09,0.316125
1996-05-14,0.316125
2010-11-12,0.195000
2017-08-14,0.268000
1981-08-10,0.210750
1982-02-08,0.227610
1993-08-10,0.316125
1999-08-12,0.316125
2010-08-12,0.195000
2011-08-12,0.198000
2001-08-14,0.316125
2004-08-12,0.100000
1978-02-06,0.148930
1979-11-09,0.165790
1985-11-08,0.278190
1991-05-10,0.311910
2026-05-21,0.230000
1975-11-07,0.109590
2006-02-14,0.150000
1976-08-16,0.109590
1999-05-12,0.316125
2008-11-12,0.183000
1986-05-12,0.295050
1990-11-09,0.311910
1992-02-10,0.311910
1995-05-10,0.316125
1974-02-08,0.103970
1977-02-07,0.123640
1983-05-10,0.244470
1999-11-12,0.316125
2004-11-23,0.100000
2015-05-13,0.248000
1988-08-10,0.311910
1986-08-11,0.295050
1990-02-12,0.311910
1999-02-11,0.316125
1970-11-06,0.084300
1978-08-14,0.148930
1994-05-10,0.316125
1997-05-14,0.316125
2018-02-14,0.278000
2025-02-20,0.220000
1978-05-15,0.148930
1987-08-10,0.303480
1993-05-10,0.316125
2015-11-10,0.248000
1975-02-07,0.109590
1989-02-10,0.311910
2005-02-14,0.100000
2018-08-15,0.278000
1988-05-10,0.311910
2020-08-19,0.150000
1974-11-08,0.109590
1976-11-15,0.123640
1982-08-10,0.227610
2000-11-14,0.316125
1987-02-09,0.295050
1974-05-13,0.103970
1996-11-13,0.316125
1998-08-12,0.316125
2001-02-14,0.316125
2019-08-14,0.288000