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).
44 lines
728 B
Plaintext
44 lines
728 B
Plaintext
Date,Dividends
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2006-12-01,0.05
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2007-03-16,0.05
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2007-05-24,0.05
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2007-08-24,0.05
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2007-11-30,0.06
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2008-03-14,0.06
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2008-05-22,0.06
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2008-08-22,0.06
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2008-11-21,0.06
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2009-03-13,0.06
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2009-05-21,0.06
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2009-08-21,0.06
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2009-11-20,0.06667
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2010-03-12,0.06667
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2010-05-21,0.06667
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2010-08-20,0.06667
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2010-11-10,0.06667
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2010-11-29,0.08333
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2011-07-25,0.125
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2011-09-29,0.125
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2011-12-21,0.125
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2012-03-28,0.125
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2012-07-26,0.125
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2012-09-14,0.125
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2012-12-14,0.125
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2013-03-01,0.125
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2013-06-21,0.16667
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2013-09-20,0.16667
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2013-12-20,0.16667
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2014-03-21,0.16667
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2014-06-20,0.225
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2014-09-19,0.225
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2014-12-19,0.225
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2015-03-20,0.225
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2015-06-19,0.26
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2015-09-18,0.26
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2015-12-18,0.26
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2016-03-18,0.26
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2016-06-17,0.26
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2016-09-16,0.26
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2016-12-16,0.26
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2017-07-07,5.0
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