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).
1.1 KiB
1.1 KiB
| 1 | Date | Dividends |
|---|---|---|
| 2 | 2005-04-13 | 1.565 |
| 3 | 2005-07-13 | 1.565 |
| 4 | 2005-10-12 | 1.565 |
| 5 | 2006-01-11 | 1.565 |
| 6 | 2006-04-11 | 1.565 |
| 7 | 2006-07-12 | 1.565 |
| 8 | 2006-10-11 | 1.565 |
| 9 | 2007-01-10 | 1.64 |
| 10 | 2007-04-11 | 1.665 |
| 11 | 2007-07-11 | 1.75 |
| 12 | 2007-10-11 | 1.775 |
| 13 | 2008-01-11 | 1.8 |
| 14 | 2008-04-11 | 1.825 |
| 15 | 2008-07-11 | 1.85 |
| 16 | 2008-10-10 | 1.86 |
| 17 | 2009-01-13 | 1.86 |
| 18 | 2009-04-13 | 1.86 |
| 19 | 2009-07-13 | 1.675 |
| 20 | 2009-10-13 | 1.675 |
| 21 | 2010-01-13 | 1.675 |
| 22 | 2010-04-13 | 1.675 |
| 23 | 2010-07-13 | 1.675 |
| 24 | 2010-10-13 | 1.675 |
| 25 | 2011-01-12 | 1.7 |
| 26 | 2011-04-13 | 1.725 |
| 27 | 2011-07-13 | 1.74 |
| 28 | 2011-10-12 | 1.775 |
| 29 | 2012-01-11 | 1.815 |
| 30 | 2012-05-11 | 1.855 |
| 31 | 2012-08-13 | 1.895 |
| 32 | 2012-11-13 | 1.935 |
| 33 | 2013-02-13 | 1.98 |
| 34 | 2013-05-13 | 2.02 |
| 35 | 2013-08-13 | 2.06 |
| 36 | 2013-11-13 | 2.07 |
| 37 | 2014-02-12 | 2.08 |
| 38 | 2014-05-13 | 2.09 |
| 39 | 2014-08-13 | 2.1 |
| 40 | 2014-11-12 | 2.11 |
| 41 | 2015-02-11 | 2.12 |
| 42 | 2015-05-11 | 2.135 |
| 43 | 2015-05-13 | 2.135 |
| 44 | 2015-08-12 | 2.145 |
| 45 | 2015-11-10 | 2.155 |
| 46 | 2016-02-10 | 2.155 |
| 47 | 2016-05-11 | 2.155 |
| 48 | 2016-08-11 | 2.155 |
| 49 | 2016-11-10 | 2.155 |
| 50 | 2017-02-13 | 2.155 |
| 51 | 2017-05-11 | 2.155 |
| 52 | 2017-08-11 | 2.155 |
| 53 | 2017-11-14 | 2.155 |
| 54 | 2018-02-14 | 2.155 |
| 55 | 2018-03-14 | 1.615 |
| 56 | 2018-05-14 | 1.615 |
| 57 | 2018-08-14 | 1.615 |
| 58 | 2018-11-14 | 1.615 |
| 59 | 2019-02-14 | 1.615 |
| 60 | 2019-05-14 | 1.615 |
| 61 | 2019-08-14 | 1.615 |
| 62 | 2019-11-14 | 1.615 |
| 63 | 2020-02-13 | 1.615 |
| 64 | 2020-05-14 | 0.165 |
| 65 | 2020-08-13 | 0.245 |
| 66 | 2020-11-12 | 0.245 |
| 67 | 2021-02-11 | 0.245 |
| 68 | 2021-05-13 | 0.245 |
| 69 | 2021-08-12 | 0.245 |