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).
32 lines
523 B
Plaintext
32 lines
523 B
Plaintext
Date,Dividends
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2008-12-10,15.318
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2008-12-30,0.033
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2009-12-09,0.498
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2009-12-30,1.962
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2010-03-18,0.213
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2010-04-05,0.06
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2010-06-17,0.177
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2010-09-16,0.243
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2010-12-31,1.098
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2011-03-17,0.096
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2011-06-16,0.141
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2011-09-15,0.216
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2011-12-28,0.633
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2012-03-22,0.003
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2012-06-21,0.018
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2013-03-21,0.174
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2013-06-20,0.444
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2013-09-19,0.471
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2013-12-27,0.558
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2014-03-20,0.099
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2014-06-19,0.342
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2014-09-18,0.18
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2014-12-29,0.074
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2015-03-19,0.001
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2015-06-18,0.052
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2015-09-17,0.244
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2015-12-29,0.18
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2017-06-15,0.052
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2017-09-14,0.007
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2017-12-27,0.019
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