Is the price file already adjusted? The pre and post close quotient

WITH
sp AS (
    SELECT
        ticker,
        execution_date,
        toFloat64(any(split_to)) / toFloat64(any(split_from)) AS n
    FROM global_markets.stocks_splits
    WHERE execution_date >= '2020-01-01'
      AND execution_date < today() - 20
      AND split_to >= split_from * 3
      AND ticker IN ('AAPL', 'AMZN', 'CMG', 'GOOGL', 'NVDA', 'SHOP', 'TSLA', 'WMT')
    GROUP BY ticker, execution_date
),
px AS (
    SELECT
        ticker,
        date,
        toFloat64(any(close)) AS c
    FROM global_markets.stocks_daily_aggs
    WHERE ticker IN ('AAPL', 'AMZN', 'CMG', 'GOOGL', 'NVDA', 'SHOP', 'TSLA', 'WMT')
      AND date >= '2019-12-01'
      AND date < today()
    GROUP BY ticker, date
)
SELECT
    concat(sp.ticker, ' ', formatDateTime(sp.execution_date, '%b %Y'))  AS split_event,
    round(any(sp.n), 2)                                                 AS split_n,
    round(argMaxIf(px.c, px.date, px.date <  sp.execution_date)
        / argMinIf(px.c, px.date, px.date >= sp.execution_date), 3)     AS close_ratio
FROM sp
INNER JOIN px ON px.ticker = sp.ticker
WHERE px.date >= sp.execution_date - 15
  AND px.date <= sp.execution_date + 15
GROUP BY sp.ticker, sp.execution_date
HAVING countIf(px.date <  sp.execution_date) > 0
   AND countIf(px.date >= sp.execution_date) > 0
ORDER BY close_ratio DESC, split_event