Three household payers at their last ex-date: prior close, ex-morning open, and the payment for scale

WITH last_ex AS (
    SELECT ticker,
           max(ex_dividend_date) AS ex_d,
           argMax(cash_amount, ex_dividend_date) AS div_amt
    FROM global_markets.stocks_dividends
    WHERE ticker IN ('KO', 'VZ', 'XOM')
      AND cash_amount > 0
      AND distribution_type = 'recurring'
      AND ex_dividend_date < today()
      AND ex_dividend_date >= today() - 120
    GROUP BY ticker
),
daily AS (
    SELECT ticker,
           toDate(toTimeZone(window_start, 'America/New_York')) AS d,
           argMaxIf(toFloat64(close), window_start, (toHour(toTimeZone(window_start, 'America/New_York')) * 60 + toMinute(toTimeZone(window_start, 'America/New_York'))) BETWEEN 570 AND 959) AS close_px,
           argMinIf(toFloat64(open), window_start, (toHour(toTimeZone(window_start, 'America/New_York')) * 60 + toMinute(toTimeZone(window_start, 'America/New_York'))) BETWEEN 570 AND 959) AS open_px,
           countIf((toHour(toTimeZone(window_start, 'America/New_York')) * 60 + toMinute(toTimeZone(window_start, 'America/New_York'))) BETWEEN 570 AND 959) AS bars
    FROM global_markets.delayed_stocks_minute_aggs
    WHERE ticker IN ('KO', 'VZ', 'XOM')
      AND window_start >= toDateTime(today() - 130)
    GROUP BY ticker, d
    HAVING bars > 200
),
seq AS (
    SELECT ticker, d, open_px, close_px,
           lagInFrame(close_px, 1) OVER (PARTITION BY ticker ORDER BY d ROWS BETWEEN 1 PRECEDING AND CURRENT ROW) AS pre_close
    FROM daily
)
SELECT s.ticker AS ticker,
       toString(e.ex_d) AS last_ex_date,
       formatDateTime(e.ex_d, '%b %e') AS last_ex_label,
       round(e.div_amt, 4) AS dividend_usd,
       round(s.pre_close, 2) AS close_before_ex_usd,
       round(s.open_px, 2) AS ex_morning_open_usd,
       round(100 * (s.open_px - s.pre_close) / s.pre_close, 2) AS open_gap_pct,
       round(100 * e.div_amt / s.pre_close, 2) AS dividend_pct_of_price
FROM seq s
JOIN last_ex e ON e.ticker = s.ticker AND e.ex_d = s.d
WHERE s.pre_close > 0
ORDER BY ticker