Greg Pomerantz
3c5bee96ce
Some dump files carry a trailing 'ctime' column: an older pipeline appended a FULL re-download of the symbol per download (up to ~28 vintages per date, 2019-2022). The consumer keeps the last row per date, so it silently used stale (~2021) vintages where Yahoo later revised values. scripts/clean_multivintage.py keeps, per date, the rows from the newest ctime (event files keep distinct same-day amounts; history/split keep the single newest row), drops the ctime column, sorts by date. Applied to the data root and overrides/frozen (which carried the same artifact): 1,065 files, 2,202,712 stale rows dropped. Also: stripped 3 UTF-8 BOMs (teg/lo/krft), refreshed the event backup with the cleaned files, and re-ran the double-listing scan: category C (83 symbols, 18,636 repeated within-file rows) is fully explained by the multi-vintage artifact and is now gone; A (6,589 pairs, corrected) and B (12,366 pairs, open review list) are unchanged. Whole-set structural QC after cleaning: 0 duplicate dates, 3 syms/15 rows of OHLC invariant violations, 15 syms/2,897 rows of non-positive prices (mostly long-delisted tickers), 8 unsorted files (reader sorts).
2.3 KiB
2.3 KiB
| 1 | Date | Dividends |
|---|---|---|
| 2 | 1985-08-19 | 0.03125 |
| 3 | 1985-11-18 | 0.03125 |
| 4 | 1986-02-14 | 0.03125 |
| 5 | 1986-05-19 | 0.03125 |
| 6 | 1986-08-18 | 0.03125 |
| 7 | 1986-11-17 | 0.03125 |
| 8 | 1987-02-13 | 0.035 |
| 9 | 1987-05-18 | 0.035 |
| 10 | 1987-08-24 | 0.035 |
| 11 | 1987-11-20 | 0.035 |
| 12 | 1988-02-22 | 0.04 |
| 13 | 1988-05-23 | 0.04 |
| 14 | 1988-08-22 | 0.035 |
| 15 | 1988-11-18 | 0.04 |
| 16 | 1989-02-17 | 0.04 |
| 17 | 1989-05-22 | 0.04 |
| 18 | 1989-08-21 | 0.04 |
| 19 | 1989-11-17 | 0.04 |
| 20 | 1990-02-26 | 0.04 |
| 21 | 1990-05-22 | 0.04 |
| 22 | 1990-08-21 | 0.04 |
| 23 | 1990-11-16 | 0.04 |
| 24 | 1991-02-22 | 0.04 |
| 25 | 1991-05-24 | 0.04 |
| 26 | 1991-08-26 | 0.04 |
| 27 | 1991-11-22 | 0.04 |
| 28 | 1992-02-24 | 0.04 |
| 29 | 1992-06-03 | 0.04 |
| 30 | 1992-08-25 | 0.04 |
| 31 | 1992-11-23 | 0.04 |
| 32 | 1993-02-22 | 0.04 |
| 33 | 1993-05-24 | 0.04 |
| 34 | 1993-08-25 | 0.04 |
| 35 | 1993-11-23 | 0.04 |
| 36 | 1994-02-22 | 0.045 |
| 37 | 1994-05-24 | 0.045 |
| 38 | 1994-08-25 | 0.045 |
| 39 | 1994-11-23 | 0.045 |
| 40 | 1995-02-22 | 0.05 |
| 41 | 1995-05-24 | 0.05 |
| 42 | 1995-08-29 | 0.05 |
| 43 | 1995-11-28 | 0.05 |
| 44 | 1996-02-27 | 0.055 |
| 45 | 1996-05-29 | 0.055 |
| 46 | 1996-08-28 | 0.055 |
| 47 | 1996-11-26 | 0.055 |
| 48 | 1997-02-26 | 0.065 |
| 49 | 1997-05-28 | 0.065 |
| 50 | 1997-08-27 | 0.065 |
| 51 | 1997-11-25 | 0.065 |
| 52 | 1998-02-25 | 0.07 |
| 53 | 1998-05-27 | 0.07 |
| 54 | 1998-08-27 | 0.07 |
| 55 | 1998-11-25 | 0.07 |
| 56 | 1999-02-24 | 0.075 |
| 57 | 1999-05-26 | 0.075 |
| 58 | 1999-08-27 | 0.075 |
| 59 | 1999-11-26 | 0.075 |
| 60 | 2000-02-25 | 0.08 |
| 61 | 2000-05-26 | 0.08 |
| 62 | 2000-08-29 | 0.08 |
| 63 | 2000-11-28 | 0.08 |
| 64 | 2001-02-26 | 0.085 |
| 65 | 2001-05-29 | 0.085 |
| 66 | 2001-08-29 | 0.085 |
| 67 | 2001-11-28 | 0.085 |
| 68 | 2002-02-26 | 0.09 |
| 69 | 2002-05-29 | 0.09 |
| 70 | 2002-08-28 | 0.09 |
| 71 | 2002-11-25 | 0.09 |
| 72 | 2003-02-26 | 0.095 |
| 73 | 2003-05-28 | 0.095 |
| 74 | 2003-08-27 | 0.095 |
| 75 | 2003-11-24 | 0.095 |
| 76 | 2004-02-25 | 0.12 |
| 77 | 2004-05-26 | 0.12 |
| 78 | 2004-08-27 | 0.12 |
| 79 | 2004-11-26 | 0.12 |
| 80 | 2005-02-24 | 0.14 |
| 81 | 2005-05-26 | 0.14 |
| 82 | 2005-08-29 | 0.14 |
| 83 | 2005-11-28 | 0.14 |
| 84 | 2006-02-24 | 0.16 |
| 85 | 2006-05-26 | 0.16 |
| 86 | 2006-08-29 | 0.16 |
| 87 | 2006-11-28 | 0.16 |
| 88 | 2007-02-26 | 0.185 |
| 89 | 2007-05-29 | 0.185 |
| 90 | 2007-08-29 | 0.185 |
| 91 | 2007-11-28 | 0.185 |
| 92 | 2008-02-27 | 0.215 |
| 93 | 2008-05-28 | 0.215 |
| 94 | 2008-08-27 | 0.215 |
| 95 | 2008-11-24 | 0.215 |
| 96 | 2009-02-25 | 0.225 |
| 97 | 2009-05-27 | 0.225 |
| 98 | 2009-08-27 | 0.225 |
| 99 | 2009-11-25 | 0.225 |
| 100 | 2010-02-24 | 0.23 |
| 101 | 2010-05-26 | 0.23 |
| 102 | 2010-08-27 | 0.23 |
| 103 | 2010-11-26 | 0.23 |
| 104 | 2011-02-24 | 0.255 |
| 105 | 2011-05-26 | 0.255 |
| 106 | 2011-08-29 | 0.255000 |
| 107 | 2011-11-28 | 0.383 |
| 108 | 2012-02-24 | 0.383 |
| 109 | 2012-05-29 | 0.383 |
| 110 | 2012-08-29 | 0.383 |
| 111 | 2012-11-28 | 0.383 |
| 112 | 2013-02-26 | 0.407 |
| 113 | 2013-05-29 | 0.407 |
| 114 | 2013-08-28 | 0.407 |
| 115 | 2013-11-26 | 0.407 |
| 116 | 2013-11-27 | 0.4075 |
| 117 | 2014-02-26 | 0.433 |
| 118 | 2014-05-28 | 0.433 |
| 119 | 2014-08-27 | 0.433 |
| 120 | 2014-11-25 | 0.433 |
| 121 | 2015-02-25 | 0.458 |
| 122 | 2015-05-27 | 0.458 |
| 123 | 2015-08-27 | 0.457500 |
| 124 | 2015-11-25 | 0.458 |
| 125 | 2016-02-25 | 0.495 |
| 126 | 2016-05-26 | 0.495 |
| 127 | 2016-08-29 | 0.495 |
| 128 | 2016-11-28 | 0.495 |
| 129 | 2017-02-24 | 0.52 |
| 130 | 2017-05-26 | 0.52 |
| 131 | 2017-08-29 | 0.52 |
| 132 | 2017-11-29 | 0.52 |
| 133 | 2018-02-27 | 0.545 |
| 134 | 2018-05-30 | 0.545 |
| 135 | 2018-08-30 | 0.545 |
| 136 | 2018-11-29 | 0.545000 |
| 137 | 2019-02-27 | 0.575 |
| 138 | 2019-05-30 | 0.575000 |
| 139 | 2019-08-29 | 0.575000 |
| 140 | 2019-11-27 | 0.575 |
| 141 | 2020-02-27 | 0.595 |