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).
41 lines
646 B
Plaintext
41 lines
646 B
Plaintext
Date,Dividends
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2013-03-01,0.0
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2013-04-01,0.0
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2013-05-01,0.0
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2013-06-03,0.0
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2013-07-01,0.0
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2013-09-03,0.0
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2013-10-01,0.0
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2013-11-01,0.0
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2013-12-02,0.0
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2014-01-02,0.0
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2014-02-03,0.0
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2014-03-03,0.0
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2014-04-01,0.0
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2014-05-01,0.0
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2016-11-01,0.0
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2016-12-01,0.0
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2017-11-01,0.005
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2018-01-02,0.009
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2018-03-01,0.013
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2018-06-01,0.017
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2018-07-02,0.006
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2018-08-01,0.027
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2018-09-04,0.036
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2018-10-01,0.014
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2018-11-01,0.025
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2018-12-03,0.043
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2019-01-02,0.053
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2019-02-01,0.042
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2019-03-01,0.049
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2019-04-01,0.043
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2019-05-01,0.054
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2019-06-03,0.065
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2019-07-01,0.048
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2019-08-01,0.047
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2019-09-03,0.049
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2019-10-01,0.036
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2019-11-01,0.035
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2019-12-02,0.023
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2020-01-02,0.029
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