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).
675 B
675 B
| 1 | Date | Dividends |
|---|---|---|
| 2 | 2014-02-26 | 0.110000 |
| 3 | 2014-05-28 | 0.110000 |
| 4 | 2014-08-27 | 0.125000 |
| 5 | 2014-11-24 | 0.125000 |
| 6 | 2015-02-26 | 0.125000 |
| 7 | 2015-05-27 | 0.125000 |
| 8 | 2015-08-26 | 0.125000 |
| 9 | 2015-11-24 | 0.125000 |
| 10 | 2016-02-25 | 0.125000 |
| 11 | 2016-05-25 | 0.135000 |
| 12 | 2016-08-26 | 0.135000 |
| 13 | 2016-11-16 | 0.135000 |
| 14 | 2017-02-24 | 0.135000 |
| 15 | 2017-05-26 | 0.135000 |
| 16 | 2017-08-28 | 0.135000 |
| 17 | 2017-11-29 | 0.135000 |
| 18 | 2018-02-27 | 0.135000 |
| 19 | 2018-05-30 | 0.135000 |
| 20 | 2018-08-29 | 0.135000 |
| 21 | 2018-11-29 | 0.135000 |
| 22 | 2019-02-27 | 0.135000 |
| 23 | 2019-05-30 | 0.135000 |
| 24 | 2019-08-29 | 0.135000 |
| 25 | 2019-11-25 | 0.135000 |
| 26 | 2020-02-27 | 0.135000 |
| 27 | 2020-05-28 | 0.135000 |
| 28 | 2020-08-28 | 0.135000 |
| 29 | 2020-11-27 | 0.135000 |
| 30 | 2021-02-25 | 0.135000 |
| 31 | 2021-05-27 | 0.135000 |
| 32 | 2021-08-30 | 0.135000 |
| 33 | 2021-11-29 | 0.075000 |
| 34 | 2022-02-25 | 0.075000 |