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).
30 lines
486 B
Plaintext
30 lines
486 B
Plaintext
Date,Dividends
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2003-12-26,0.036
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2005-12-23,0.306
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2006-07-05,0.057
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2006-12-21,0.959
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2007-07-03,0.402
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2007-12-20,2.66
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2008-07-02,0.319
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2008-12-19,0.719
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2009-07-02,0.15
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2009-12-18,0.031
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2010-04-30,0.044
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2010-07-07,0.028
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2010-12-17,0.432
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2011-07-07,0.073
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2011-12-16,0.403
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2012-12-17,0.62
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2013-07-02,0.079
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2013-12-16,0.813
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2014-07-02,0.152
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2014-12-16,1.32
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2015-07-02,0.178
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2015-12-16,1.092
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2016-07-05,0.092
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2016-12-16,0.818
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2017-07-07,0.031
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2017-12-18,1.125
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2018-07-06,0.198
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2018-12-17,1.15
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