Average absolute open to close move on SPY Fridays, expiration vs ordinary, by year

Answered against 22 years of US equities and 12 years of US options data and published with the query that produced it. This result is stored as of 2026-08-22, from Quadruple Witching vs Triple Witching.

Rows × columns

10 × 4

Computed

2026-08-22

Completeness

No missing values

Source

US exchange, SIP and OPRA market data

Licence

Strasmore terms · free, no signup

Formats

JSON · CSV · the SQL below

What each column holds

Computed from Strasmore's warehouse of US exchange, SIP and OPRA market data. Equity prices are delayed; options greeks and implied volatility are end-of-day. This result is stored, not recomputed on load — it is exactly the numbers that were returned on 2026-08-22, and the query below is what returned them.

WITH fridays AS
(
    SELECT
        toYear(date) AS y,
        abs(100 * (toFloat64(close) - toFloat64(open)) / toFloat64(open)) AS abs_move_pct,
        (toMonth(date) IN (3, 6, 9, 12) AND toDayOfMonth(date) BETWEEN 15 AND 21) AS is_expiry
    FROM global_markets.stocks_daily_aggs
    WHERE ticker = 'SPY'
      AND date >= '2016-01-01'
      AND date <  today()
      AND toDayOfWeek(date) = 5
      AND toFloat64(open) > 0
)
SELECT
    toString(y)                                  AS year,
    round(avgIf(abs_move_pct, is_expiry = 1), 2) AS expiry_friday_move_pct,
    round(avgIf(abs_move_pct, is_expiry = 0), 2) AS other_friday_move_pct,
    countIf(is_expiry = 1)                       AS expiry_session_count
FROM fridays
GROUP BY y
HAVING countIf(is_expiry = 1) >= 2
   AND countIf(is_expiry = 0) >= 2
ORDER BY y