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).
70 lines
1.1 KiB
Plaintext
70 lines
1.1 KiB
Plaintext
Date,Dividends
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2005-04-13,1.565
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2005-07-13,1.565
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2005-10-12,1.565
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2006-01-11,1.565
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2006-04-11,1.565
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2006-07-12,1.565
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2006-10-11,1.565
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2007-01-10,1.64
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2007-04-11,1.665
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2007-07-11,1.75
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2007-10-11,1.775
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2008-01-11,1.8
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2008-04-11,1.825
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2008-07-11,1.85
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2008-10-10,1.86
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2009-01-13,1.86
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2009-04-13,1.86
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2009-07-13,1.675
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2009-10-13,1.675
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2010-01-13,1.675
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2010-04-13,1.675
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2010-07-13,1.675
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2010-10-13,1.675
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2011-01-12,1.7
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2011-04-13,1.725
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2011-07-13,1.74
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2011-10-12,1.775
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2012-01-11,1.815
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2012-05-11,1.855
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2012-08-13,1.895
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2012-11-13,1.935
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2013-02-13,1.98
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2013-05-13,2.02
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2013-08-13,2.06
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2013-11-13,2.07
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2014-02-12,2.08
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2014-05-13,2.09
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2014-08-13,2.1
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2014-11-12,2.11
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2015-02-11,2.12
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2015-05-11,2.135
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2015-05-13,2.135
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2015-08-12,2.145
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2015-11-10,2.155
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2016-02-10,2.155
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2016-05-11,2.155
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2016-08-11,2.155
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2016-11-10,2.155
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2017-02-13,2.155
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2017-05-11,2.155
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2017-08-11,2.155
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2017-11-14,2.155
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2018-02-14,2.155
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2018-03-14,1.615
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2018-05-14,1.615
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2018-08-14,1.615
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2018-11-14,1.615
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2019-02-14,1.615
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2019-05-14,1.615
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2019-08-14,1.615
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2019-11-14,1.615
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2020-02-13,1.615
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2020-05-14,0.165
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2020-08-13,0.245
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2020-11-12,0.245
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2021-02-11,0.245
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2021-05-13,0.245
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2021-08-12,0.245
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