f/overrides/event-backup/comax-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

184 lines
3.6 KiB
Plaintext

Date,Dividends
1988-08-12,0.035000
1990-04-10,0.035000
1991-10-03,0.035000
1993-08-03,0.035000
1997-04-02,0.090000
1984-08-20,0.045000
1988-01-12,0.035000
1988-09-09,0.035000
1989-12-13,0.170000
2002-06-28,0.049000
1984-11-15,0.045000
1988-07-12,0.035000
1992-08-04,0.035000
1995-04-10,0.035000
1994-08-02,0.035000
2018-03-22,0.100000
2022-12-19,0.006000
1984-12-17,0.045000
1985-07-18,0.045000
1988-12-30,0.035000
1990-07-10,0.035000
1994-05-03,0.035000
1989-06-09,0.035000
1991-06-04,0.035000
1992-06-03,0.035000
2014-03-24,0.089000
1989-11-10,0.035000
1993-05-04,0.035000
1995-12-22,0.101000
1988-03-10,0.035000
1990-02-09,0.035000
1987-03-17,0.035000
1987-08-17,0.035000
1992-05-05,0.035000
1997-10-02,0.090000
1993-06-02,0.035000
1993-12-29,0.035000
1998-10-02,0.035000
1999-07-02,0.055000
1990-03-09,0.035000
1993-11-02,0.035000
1994-07-05,0.035000
1995-02-10,0.035000
1997-07-02,0.490000
2017-12-19,0.413000
1984-05-17,0.045000
1985-08-19,0.045000
1985-12-17,0.045000
1987-01-16,0.035000
1993-12-06,0.035000
1988-04-12,0.035000
1991-08-02,0.035000
1995-10-10,0.090000
1987-04-16,0.035000
1987-05-15,0.035000
1990-10-10,0.035000
1991-02-05,0.035000
2026-06-23,0.422000
1990-08-10,0.035000
1990-11-09,0.035000
1991-07-03,0.035000
1985-02-14,0.045000
1985-11-15,0.045000
1989-08-10,0.035000
1989-12-29,0.035000
1990-06-12,0.035000
1995-05-10,0.035000
1999-10-04,0.135000
1988-11-10,0.035000
1989-05-10,0.035000
2021-12-17,2.606000
1988-06-10,0.035000
1993-02-02,0.035000
1992-02-04,0.035000
1998-07-02,0.320000
2009-12-14,0.254000
1986-04-17,0.045000
1987-10-16,0.035000
1988-02-10,0.035000
1990-05-10,0.035000
1991-11-05,0.035000
1988-05-10,0.035000
1989-07-11,0.035000
1992-03-03,0.035000
1984-07-18,0.045000
1985-01-18,0.045000
1986-01-17,0.045000
1986-09-17,0.045000
1986-10-20,0.045000
1993-10-04,0.035000
1998-12-08,0.860000
2016-12-19,1.014000
1986-08-18,0.045000
1992-11-04,0.035000
1994-09-02,0.035000
2016-03-23,0.072000
2019-12-18,0.015000
1987-02-17,0.035000
1992-04-03,0.035000
1992-07-06,0.035000
1997-12-15,1.230000
1984-04-16,0.045000
1986-02-14,0.045000
1987-11-17,0.035000
1991-03-05,0.035000
1992-10-05,0.035000
1991-05-03,0.035000
1993-03-02,0.035000
1995-01-09,0.035000
1984-06-18,0.045000
1985-05-17,0.045000
1986-05-16,0.045000
1986-12-17,0.045000
1988-12-16,0.070000
1994-03-09,0.035000
2000-07-05,0.020000
2014-12-18,0.353000
1985-10-18,0.045000
1986-06-17,0.045000
1986-11-17,0.045000
1990-09-11,0.035000
1993-09-02,0.035000
1985-03-18,0.045000
1987-07-17,0.035000
1991-04-03,0.035000
2002-11-29,0.046000
1992-09-03,0.035000
1993-07-06,0.035000
1996-04-02,0.090000
1985-09-17,0.045000
1986-07-18,0.045000
1987-09-17,0.035000
1989-02-10,0.035000
1990-12-28,0.035000
2012-03-23,0.003000
2000-12-08,2.250000
1987-12-10,0.035000
1992-12-10,0.035000
1993-04-02,0.035000
1994-02-02,0.035000
1996-12-23,0.890000
1987-06-17,0.035000
1991-09-04,0.035000
1994-06-02,0.035000
1995-06-12,0.035000
2010-12-17,0.185000
1994-11-10,0.035000
1996-10-02,0.150000
1998-04-02,0.090000
1984-09-14,0.045000
1984-10-15,0.045000
1985-06-17,0.045000
1988-10-11,0.035000
1991-12-30,0.035000
1999-12-07,3.860000
2008-12-12,0.334000
2015-03-24,0.063000
2018-12-19,3.573000
1994-12-12,0.005000
1996-07-02,0.090000
2009-03-24,0.002000
1986-03-17,0.045000
1989-03-10,0.035000
1989-04-11,0.035000
1989-09-12,0.035000
1994-10-10,0.035000
2025-05-28,15.000000
2025-12-17,0.015000
2000-04-04,0.280000
2015-12-17,0.306000
1985-04-17,0.045000
1991-12-16,0.076000
1994-04-05,0.035000
1995-03-10,0.035000
1999-04-07,1.590000
1989-10-11,0.035000
1992-12-29,0.035000
1995-07-10,0.035000
2013-12-18,0.239000
1990-12-17,0.060000
2011-12-19,0.569000
2012-12-19,0.420000