What one contract controls: SPX, SPY and XSP

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 SPX vs SPY Options: Which One to Trade.

Rows × columns

3 × 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 latest AS
(
    SELECT
        argMax(toFloat64(close), date) AS spy_close,
        max(date)                      AS pricing_date
    FROM global_markets.stocks_daily_aggs
    WHERE ticker = 'SPY'
      AND date >= today() - 45
)
SELECT
    ticker,
    formatDateTime(pricing_date, '%b %e, %Y')                    AS priced_on,
    toString(toUInt32(round(spy_close * spy_multiple)))          AS quoted_level,
    toUInt32(round(spy_close * spy_multiple * 100))              AS contract_notional_usd
FROM latest
ARRAY JOIN
    ['SPX', 'SPY', 'XSP'] AS ticker,
    [10.0, 1.0, 1.0]      AS spy_multiple
ORDER BY ticker