f/overrides/event-backup/mrk-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

226 lines
4.4 KiB
Plaintext

Date,Dividends
2010-09-13,0.362595
2013-06-13,0.410305
1973-06-05,0.007819
2001-08-30,0.333969
2002-09-04,0.343511
1976-03-02,0.009277
1993-03-02,0.119275
2014-12-11,0.429389
2000-05-31,0.276718
2015-12-11,0.438931
1981-03-02,0.017229
1987-12-01,0.042409
1993-09-02,0.133588
2016-06-13,0.438931
2017-03-13,0.448473
1990-08-28,0.089059
1994-06-02,0.133588
1994-09-02,0.143130
1983-11-29,0.019879
2016-09-13,0.438931
1970-06-02,0.006626
1990-05-29,0.071565
2007-06-06,0.362595
1996-12-05,0.190840
1980-08-29,0.015241
1991-12-02,0.100191
2024-03-14,0.770000
1979-08-31,0.012590
1979-12-03,0.015241
2006-08-30,0.362595
2015-06-11,0.429389
2021-12-14,0.690000
1974-08-30,0.009277
1995-12-06,0.162214
2014-09-11,0.419847
2017-12-14,0.458015
1991-03-04,0.089059
1997-06-05,0.200382
2002-12-04,0.343511
1979-05-25,0.012590
2005-03-02,0.362595
2012-12-13,0.410305
1996-09-04,0.190840
2019-06-14,0.524809
2004-06-02,0.353053
1976-08-30,0.009277
1985-08-30,0.021204
2001-12-05,0.333969
1993-06-02,0.119275
1984-08-31,0.019879
1999-09-01,0.276718
2014-03-13,0.419847
1986-12-02,0.029156
1995-09-05,0.162214
1991-08-30,0.100191
2022-09-14,0.690000
1978-03-02,0.011265
1984-05-29,0.019879
2002-03-06,0.333969
1976-11-30,0.009940
2005-11-30,0.362595
2016-03-11,0.438931
2023-12-14,0.770000
2025-09-15,0.810000
1981-12-01,0.018554
2013-09-12,0.410305
2017-06-13,0.448473
1992-06-02,0.109733
1994-12-02,0.143130
2011-06-13,0.362595
1975-03-03,0.009277
1986-06-03,0.023855
1990-12-03,0.089059
2018-03-14,0.458015
2018-12-14,0.524809
2026-06-15,0.850000
1980-06-02,0.015241
1998-06-03,0.214695
1999-03-03,0.257634
1982-11-30,0.018554
2007-09-05,0.362595
2020-03-13,0.582061
2011-12-13,0.400763
2012-09-13,0.400763
2020-06-12,0.582061
1973-08-31,0.007819
1975-12-01,0.009277
2000-12-06,0.324427
1975-06-02,0.009277
2000-03-01,0.276718
2008-12-03,0.362595
2006-12-06,0.362595
1978-08-28,0.011265
2008-06-04,0.362595
2018-09-14,0.458015
2020-09-14,0.582061
2022-03-14,0.690000
1988-11-29,0.058842
1994-03-02,0.133588
2001-05-31,0.324427
2011-03-11,0.362595
2018-06-14,0.458015
2019-12-13,0.582061
2025-03-17,0.810000
1977-11-28,0.011265
1998-12-02,0.257634
2005-08-31,0.362595
2019-09-13,0.524809
1978-12-04,0.012590
1983-08-29,0.018554
2003-03-05,0.343511
1998-09-02,0.257634
2009-06-04,0.362595
2023-06-14,0.730000
1980-02-28,0.015241
1989-03-02,0.065204
1992-08-31,0.119275
1980-12-02,0.017229
1999-06-02,0.257634
2006-05-31,0.362595
2004-12-01,0.362595
2017-09-14,0.448473
1974-03-04,0.009277
1998-03-04,0.214695
2004-09-01,0.362595
2015-09-11,0.429389
2021-06-14,0.650000
2023-03-14,0.730000
1972-03-02,0.007289
2001-03-07,0.324427
2011-09-13,0.362595
1996-03-06,0.162214
2002-06-05,0.333969
2020-12-14,0.620229
1971-06-07,0.007289
1973-03-05,0.007819
1992-12-02,0.119275
1989-12-04,0.071565
2012-03-13,0.400763
2006-03-08,0.362595
2010-06-11,0.362595
2019-03-14,0.524809
1995-03-03,0.143130
2009-03-04,0.362595
2015-03-12,0.429389
2023-09-14,0.730000
1972-06-09,0.007289
1985-02-28,0.021204
2003-08-20,2.744275
2010-12-13,0.362595
2021-09-14,0.650000
1999-12-01,0.276718
2009-12-11,0.362595
1985-12-03,0.023855
1987-06-02,0.029156
1997-09-03,0.214695
2010-03-11,0.362595
2025-12-15,0.850000
1971-03-02,0.007289
1975-08-29,0.009277
1977-05-31,0.009940
1987-03-02,0.029156
2000-08-30,0.324427
1971-12-06,0.007289
1981-08-31,0.017229
2012-06-13,0.400763
1970-12-01,0.007289
1977-03-01,0.009940
2008-03-05,0.362595
1978-05-26,0.011265
1982-08-30,0.018554
1986-09-02,0.029156
1987-08-28,0.042409
1988-06-03,0.050891
1997-12-03,0.214695
2004-03-03,0.353053
2013-03-13,0.410305
1970-09-02,0.006626
1990-03-05,0.071565
2024-12-16,0.810000
1983-02-28,0.018554
1983-05-31,0.018554
2007-03-07,0.362595
1993-12-02,0.133588
2003-09-03,0.353053
2014-06-12,0.419847
1981-06-01,0.017229
2003-12-03,0.353053
2009-09-02,0.362595
1971-09-03,0.007289
1984-12-03,0.021204
2022-12-14,0.730000
2008-09-03,0.362595
2024-09-16,0.770000
1974-06-03,0.009277
1986-02-27,0.023855
1991-06-03,0.089059
1973-12-03,0.009277
1977-08-29,0.009940
1988-08-29,0.046915
1997-03-05,0.200382
2024-06-17,0.770000
1996-06-06,0.162214
2003-06-04,0.343511
2013-12-12,0.419847
1985-06-03,0.021204
2005-06-01,0.362595
2021-03-12,0.620229
1982-06-01,0.018554
1988-02-29,0.050891
2007-12-05,0.362595
1992-03-02,0.109733
2022-06-14,0.690000
1972-12-05,0.007819
1976-06-01,0.009277
2016-12-13,0.448473
2025-06-16,0.810000
2026-03-16,0.850000
1995-06-02,0.143130
1979-03-01,0.012590
1984-03-01,0.019879
1989-08-29,0.071565
1982-03-01,0.018554
1989-05-30,0.065204