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).
19 lines
301 B
Plaintext
19 lines
301 B
Plaintext
Date,Dividends
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2003-12-26,0.113
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2004-12-27,0.12
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2005-10-28,0.349
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2006-04-19,0.0
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2006-12-22,0.442
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2007-12-21,0.071
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2008-12-23,0.223
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2009-12-23,0.088
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2010-12-23,0.169
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2011-12-23,0.134
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2012-12-26,0.165
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2013-12-23,0.133
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2018-12-21,0.419
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2019-12-04,0.293
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2020-09-23,0.032
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2020-12-23,0.027
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2021-03-24,0.026
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