Realty Income (O): trailing vs forward dividend yield at every month end, two years

WITH px AS (
    SELECT toStartOfMonth(toDate(toTimeZone(window_start, 'America/New_York'))) AS month_start,
           max(toDate(toTimeZone(window_start, 'America/New_York'))) AS last_day,
           argMax(close, window_start) AS close_price
    FROM global_markets.delayed_stocks_minute_aggs
    WHERE ticker = 'O'
      AND toDate(toTimeZone(window_start, 'America/New_York')) >= toDate('2024-08-01')
      AND toDate(toTimeZone(window_start, 'America/New_York')) <= toDate('2026-07-31')
      AND (toHour(toTimeZone(window_start, 'America/New_York')) * 60
           + toMinute(toTimeZone(window_start, 'America/New_York'))) BETWEEN 570 AND 959
    GROUP BY month_start
),
dv AS (
    SELECT ex_dividend_date, cash_amount
    FROM global_markets.stocks_dividends
    WHERE ticker = 'O'
      AND distribution_type = 'recurring'
      AND frequency = 12
      AND cash_amount > 0
      AND ex_dividend_date >= toDate('2023-07-01')
)
SELECT formatDateTime(px.month_start, '%Y-%m') AS month,
       formatDateTimeInJodaSyntax(px.month_start, 'MMM yyyy') AS month_label,
       round(toFloat64(argMax(dv.cash_amount, dv.ex_dividend_date)), 4) AS declared_monthly_usd,
       countIf(dv.ex_dividend_date > px.last_day - INTERVAL 1 YEAR) AS checks_in_window,
       round(sumIf(toFloat64(dv.cash_amount), dv.ex_dividend_date > px.last_day - INTERVAL 1 YEAR)
             / toFloat64(any(px.close_price)) * 100, 2) AS trailing_yield_pct,
       round(toFloat64(argMax(dv.cash_amount, dv.ex_dividend_date)) * 12
             / toFloat64(any(px.close_price)) * 100, 2) AS forward_yield_pct,
       round(abs(toFloat64(argMax(dv.cash_amount, dv.ex_dividend_date)) * 12
                 - sumIf(toFloat64(dv.cash_amount), dv.ex_dividend_date > px.last_day - INTERVAL 1 YEAR))
             / toFloat64(any(px.close_price)) * 100, 2) AS gap_abs_pp
FROM px, dv
WHERE dv.ex_dividend_date <= px.last_day
GROUP BY px.month_start, px.last_day
ORDER BY px.month_start