IV rank and IV percentile for twelve widely held tickers, latest session

WITH per_session AS (
    SELECT underlying_symbol AS u,
           date AS d,
           quantileExact(0.5)(implied_volatility) AS iv
    FROM global_markets.options_greeks
    WHERE date >= (SELECT max(date) FROM global_markets.options_greeks) - 380
      AND underlying_symbol IN ('SPY','QQQ','AAPL','MSFT','AMZN','META','NVDA','AMD','TSLA','COIN','MSTR','PLTR')
      AND iv_converged AND implied_volatility BETWEEN 0.02 AND 5
      AND abs(strike_price / underlying_close - 1) <= 0.05
      AND expiration_date BETWEEN date + 20 AND date + 60
    GROUP BY u, d
    HAVING count() >= 10
),
ranked AS (
    SELECT u, d, iv,
           row_number() OVER w AS rn,
           first_value(iv) OVER w AS iv_latest,
           first_value(d) OVER w AS d_latest
    FROM per_session
    WINDOW w AS (PARTITION BY u ORDER BY d DESC)
),
agg AS (
    SELECT u,
           any(iv_latest) AS iv_cur,
           any(d_latest) AS last_d,
           count() AS sessions,
           min(iv) AS iv_lo,
           max(iv) AS iv_hi,
           countIf(iv < iv_latest) AS below_now
    FROM ranked
    WHERE rn <= 252
    GROUP BY u
)
SELECT u AS ticker,
       round(100 * iv_cur, 1) AS iv_now_pct,
       round(100 * (iv_cur - iv_lo) / (iv_hi - iv_lo), 1) AS iv_rank,
       round(100 * below_now / sessions, 1) AS iv_percentile,
       round(100 * iv_lo, 1) AS iv_52w_low_pct,
       round(100 * iv_hi, 1) AS iv_52w_high_pct,
       toString(last_d) AS session_date
FROM agg
WHERE sessions >= 200
  AND iv_hi > iv_lo
  AND last_d = (SELECT max(date) FROM global_markets.options_greeks)
ORDER BY iv_rank DESC, ticker