STRASMORE/EXPLORE 2,170 QUERIES

SPY options quoted-spread distribution: percentiles in basis points

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?.

as of scalar 1×6read in context →
p10 bps
35.51
p25 bps
49.65
median bps
80.97
p75 bps
147.12
p90 bps
316.51
valid two sided quotes
462.93M
Rows × columns
1 × 6
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 SPY options quoted-spread distribution: percentiles in basis points, derived from the stored result.
ColumnTypeRangeNotes
p10_bps number every row is 35.51
p25_bps number every row is 49.65
median_bps number every row is 80.97
p75_bps number every row is 147.12
p90_bps number every row is 316.51
valid_two_sided_quotes number every row is 462,934,241

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 
WITH opts AS (
    SELECT
        (toFloat64(ask_price) - toFloat64(bid_price)) / ((toFloat64(ask_price) + toFloat64(bid_price)) / 2) * 10000 AS spread_bps,
        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
)
SELECT
    round(quantileDeterministic(0.10)(spread_bps, det), 2) AS p10_bps,
    round(quantileDeterministic(0.25)(spread_bps, det), 2) AS p25_bps,
    round(quantileDeterministic(0.50)(spread_bps, det), 2) AS median_bps,
    round(quantileDeterministic(0.75)(spread_bps, det), 2) AS p75_bps,
    round(quantileDeterministic(0.90)(spread_bps, det), 2) AS p90_bps,
    count() AS valid_two_sided_quotes
FROM opts

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