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).
57 lines
940 B
Plaintext
57 lines
940 B
Plaintext
Date,Dividends
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2001-12-07,0.313
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2002-03-28,0.039
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2002-09-30,0.074
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2002-12-31,0.532
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2003-03-31,0.059
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2003-06-30,0.044
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2003-09-30,0.044
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2003-12-31,0.98
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2004-03-31,0.044
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2004-06-30,0.044
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2004-09-30,0.044
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2004-12-31,0.607
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2005-03-31,0.044
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2005-06-30,0.044
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2005-09-30,0.045
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2005-12-28,0.045
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2006-03-30,0.045
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2006-06-28,0.045
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2006-09-27,0.045
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2006-12-27,0.09
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2007-03-30,0.045
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2007-06-29,0.045
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2007-09-28,0.045
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2007-12-31,0.422
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2008-03-31,0.044
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2008-06-30,0.044
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2008-09-30,0.045
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2008-12-31,0.565
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2009-03-31,0.045
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2009-06-30,0.02
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2009-09-18,0.045
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2009-12-18,0.089
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2010-03-19,0.105
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2010-04-30,0.021
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2010-06-18,0.053
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2010-09-17,0.046
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2010-12-17,0.343
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2011-03-18,0.062
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2011-06-17,0.07
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2011-09-16,0.037
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2011-12-20,0.143
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2012-03-16,0.051
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2012-06-15,0.011
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2013-12-20,0.13
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2014-06-13,0.06
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2014-09-12,0.067
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2014-12-22,0.093
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2015-12-18,0.032
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2016-12-22,0.0
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2017-12-21,0.0
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2018-12-20,0.478
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2019-06-14,0.063
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2019-09-13,0.062
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2019-12-20,0.166
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2020-12-22,0.019
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