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).
55 lines
879 B
Plaintext
55 lines
879 B
Plaintext
Date,Dividends
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1995-10-06,0.0
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1995-12-08,0.0
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1996-10-04,0.0
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1996-12-13,0.0
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1997-10-03,0.0
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1997-12-26,0.0
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1998-10-02,0.0
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1999-10-01,0.05
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2000-10-06,0.08
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2000-12-22,0.02
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2001-10-05,0.02
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2001-12-21,0.01
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2002-06-07,1.0
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2002-12-20,0.03
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2003-10-03,0.05
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2003-12-19,0.02
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2004-10-08,0.01
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2004-12-17,0.1
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2005-10-07,0.03
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2005-12-16,0.03
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2006-10-06,0.02
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2006-12-15,0.02
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2007-10-05,0.0
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2007-12-07,0.02
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2008-10-10,0.043
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2008-12-05,0.005
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2009-10-09,0.093
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2009-12-04,0.025
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2009-12-30,0.006
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2010-04-30,0.022
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2010-10-08,0.08
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2010-12-03,0.056
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2011-10-07,0.123
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2011-12-02,0.066
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2012-10-05,0.127
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2012-12-07,0.054
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2013-10-04,0.143
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2013-12-06,0.073
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2014-10-10,0.356
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2014-12-05,0.064
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2015-10-09,0.121
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2015-12-04,0.081
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2016-10-07,0.198
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2016-12-02,0.063
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2017-10-06,0.15
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2017-12-01,0.09
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2018-10-05,0.211
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2018-12-14,0.117
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2019-10-04,0.952
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2019-12-20,0.191
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2020-10-09,0.216
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2020-12-18,0.016
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2021-04-13,0.013
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