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).
53 lines
870 B
Plaintext
53 lines
870 B
Plaintext
Date,Dividends
|
|
2009-06-26,0.103
|
|
2009-09-28,0.096
|
|
2009-12-04,0.0
|
|
2009-12-29,0.194
|
|
2010-03-29,0.09
|
|
2010-04-30,0.045
|
|
2010-06-28,0.086
|
|
2010-09-28,0.128
|
|
2010-12-06,0.0
|
|
2010-12-29,0.148
|
|
2011-03-29,0.117
|
|
2011-06-28,0.093
|
|
2011-09-28,0.067
|
|
2011-12-05,0.0
|
|
2011-12-28,0.095
|
|
2012-03-28,0.15
|
|
2012-06-27,0.114
|
|
2012-09-26,0.11
|
|
2012-12-27,0.117
|
|
2013-03-27,0.124
|
|
2013-06-26,0.084
|
|
2013-09-26,0.062
|
|
2013-12-27,0.113
|
|
2014-03-26,0.158
|
|
2014-06-26,0.106
|
|
2014-09-26,0.079
|
|
2014-12-03,0.0
|
|
2014-12-29,0.091
|
|
2015-03-27,0.066
|
|
2015-06-26,0.046
|
|
2015-09-28,0.061
|
|
2015-12-29,0.163
|
|
2016-06-28,0.064
|
|
2016-09-28,0.068
|
|
2016-12-28,0.068
|
|
2017-03-29,0.085
|
|
2017-06-28,0.059
|
|
2017-09-27,0.082
|
|
2017-12-27,0.092
|
|
2018-03-28,0.047
|
|
2018-06-27,0.031
|
|
2018-09-26,0.084
|
|
2018-12-27,0.091
|
|
2019-03-28,0.091
|
|
2019-06-27,0.089
|
|
2019-09-27,0.101
|
|
2019-12-27,0.103
|
|
2020-03-30,0.062
|
|
2020-06-29,0.05
|
|
2020-09-29,0.054
|
|
2020-12-28,0.072
|