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).
58 lines
906 B
Plaintext
58 lines
906 B
Plaintext
Date,Dividends
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2004-03-19,0.03
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2004-06-24,0.03
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2004-08-11,0.03
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2004-11-30,0.03
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2005-03-11,0.15
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2005-06-03,0.15
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2005-08-04,0.15
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2005-12-08,0.15
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2006-02-24,0.15
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2006-06-07,0.15
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2006-08-09,0.15
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2006-12-15,0.15
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2007-02-16,0.15
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2007-05-11,0.15
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2007-08-03,0.15
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2007-11-08,0.15
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2008-02-13,0.15
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2008-05-08,0.15
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2008-08-08,0.15
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2008-11-07,0.15
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2009-02-11,0.15
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2009-05-11,0.15
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2009-08-10,0.15
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2009-11-06,0.15
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2010-02-18,0.15
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2010-05-11,0.15
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2010-08-10,0.15
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2010-11-09,0.15
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2011-02-16,0.15
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2011-05-11,0.15
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2011-08-09,0.15
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2011-11-08,0.15
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2012-02-15,0.15
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2012-05-08,0.17
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2012-08-08,0.17
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2012-11-06,0.17
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2013-02-19,0.17
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2013-05-08,0.18
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2013-08-07,0.18
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2013-11-08,0.18
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2014-02-19,0.18
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2014-05-07,0.2
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2014-08-07,0.2
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2014-11-10,0.2
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2014-11-11,0.2
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2015-02-18,0.2
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2015-05-06,0.21
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2015-08-05,0.21
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2015-11-10,0.21
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2016-02-17,0.21
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2016-05-05,0.22
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2016-08-10,0.22
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2016-11-08,0.22
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2017-02-22,0.22
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2017-05-10,0.24
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2017-08-10,0.24
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