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).
24 lines
387 B
Plaintext
24 lines
387 B
Plaintext
Date,Dividends
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2014-06-27,0.067
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2014-09-29,0.046
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2014-12-17,0.054
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2015-03-30,0.05
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2015-06-29,0.072
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2015-09-29,0.053
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2015-12-17,0.061
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2016-03-30,0.071
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2016-06-29,0.055
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2016-09-29,0.048
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2016-12-14,0.189
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2017-03-30,0.086
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2017-06-29,0.055
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2017-09-28,0.062
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2017-11-29,0.039
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2017-12-27,0.153
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2018-03-28,0.041
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2018-06-28,0.013
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2018-09-27,0.05
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2018-12-27,0.175
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2019-03-28,0.072
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2019-06-18,0.179
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