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Options bid-ask spreads by product: median basis points, July 2, 2026 regular hours

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 2026-08-14, from How Much Does It Cost to Trade Options?.

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Options bid-ask spreads by product: median basis points, July 2, 2026 regular hours — 5 rows by 4 columns, computed from US exchange, SIP and OPRA data.
rootquote_updates_millionsmedian_spread_bpsmedian_width_cents
GLD19.9786.7530
IWM103.5130.728
QQQ359.7123.7111
SPY462.980.974
TSLA184.9309.9370
Rows × columns
5 × 4
Computed
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

Column definitions for Options bid-ask spreads by product: median basis points, July 2, 2026 regular hours, derived from the stored result.
ColumnTypeRangeNotes
root text 5 distinct values (GLD, IWM, QQQ…)
quote_updates_millions number 19.9 to 462.9
median_spread_bps number 80.97 to 786.75
median_width_cents number 4 to 70

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 , and the query below is what returned them.

the exact SQL behind every number 
SELECT
    root,
    round(count() / 1e6, 1) AS quote_updates_millions,
    round(quantileDeterministic(0.5)(spread_bps, det), 2) AS median_spread_bps,
    round(quantileDeterministic(0.5)(width_cents, det), 2) AS median_width_cents
FROM (
    SELECT 'SPY' AS root, (toFloat64(ask_price) - toFloat64(bid_price)) / ((toFloat64(ask_price) + toFloat64(bid_price)) / 2) * 10000 AS spread_bps, (toFloat64(ask_price) - toFloat64(bid_price)) * 100 AS width_cents, cityHash64(ticker, sip_timestamp) AS det
    FROM global_markets.cache_options_quotes
    WHERE sip_timestamp >= '2026-07-02 13:30:00' AND sip_timestamp < '2026-07-02 20:00:00'
      AND ticker >= 'O:SPY26' AND ticker < 'O:SPY27'
      AND bid_price > 0 AND ask_price > 0 AND ask_price > bid_price
    UNION ALL
    SELECT 'QQQ' AS root, (toFloat64(ask_price) - toFloat64(bid_price)) / ((toFloat64(ask_price) + toFloat64(bid_price)) / 2) * 10000 AS spread_bps, (toFloat64(ask_price) - toFloat64(bid_price)) * 100 AS width_cents, cityHash64(ticker, sip_timestamp) AS det
    FROM global_markets.cache_options_quotes
    WHERE sip_timestamp >= '2026-07-02 13:30:00' AND sip_timestamp < '2026-07-02 20:00:00'
      AND ticker >= 'O:QQQ26' AND ticker < 'O:QQQ27'
      AND bid_price > 0 AND ask_price > 0 AND ask_price > bid_price
    UNION ALL
    SELECT 'IWM' AS root, (toFloat64(ask_price) - toFloat64(bid_price)) / ((toFloat64(ask_price) + toFloat64(bid_price)) / 2) * 10000 AS spread_bps, (toFloat64(ask_price) - toFloat64(bid_price)) * 100 AS width_cents, cityHash64(ticker, sip_timestamp) AS det
    FROM global_markets.cache_options_quotes
    WHERE sip_timestamp >= '2026-07-02 13:30:00' AND sip_timestamp < '2026-07-02 20:00:00'
      AND ticker >= 'O:IWM26' AND ticker < 'O:IWM27'
      AND bid_price > 0 AND ask_price > 0 AND ask_price > bid_price
    UNION ALL
    SELECT 'GLD' AS root, (toFloat64(ask_price) - toFloat64(bid_price)) / ((toFloat64(ask_price) + toFloat64(bid_price)) / 2) * 10000 AS spread_bps, (toFloat64(ask_price) - toFloat64(bid_price)) * 100 AS width_cents, cityHash64(ticker, sip_timestamp) AS det
    FROM global_markets.cache_options_quotes
    WHERE sip_timestamp >= '2026-07-02 13:30:00' AND sip_timestamp < '2026-07-02 20:00:00'
      AND ticker >= 'O:GLD26' AND ticker < 'O:GLD27'
      AND bid_price > 0 AND ask_price > 0 AND ask_price > bid_price
    UNION ALL
    SELECT 'TSLA' AS root, (toFloat64(ask_price) - toFloat64(bid_price)) / ((toFloat64(ask_price) + toFloat64(bid_price)) / 2) * 10000 AS spread_bps, (toFloat64(ask_price) - toFloat64(bid_price)) * 100 AS width_cents, cityHash64(ticker, sip_timestamp) AS det
    FROM global_markets.cache_options_quotes
    WHERE sip_timestamp >= '2026-07-02 13:30:00' AND sip_timestamp < '2026-07-02 20:00:00'
      AND ticker >= 'O:TSLA26' AND ticker < 'O:TSLA27'
      AND bid_price > 0 AND ask_price > 0 AND ask_price > bid_price
)
GROUP BY root
ORDER BY root ASC

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