STRASMORE/EXPLORE 2,170 QUERIES

SPY options quote quality: valid, one-sided, and locked/crossed records

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 1×7read in context →
total updates
463.20M
valid two sided
462.93M
valid pct
99.94
one sided
260,716
one sided pct
0.06
locked or crossed
171
locked or crossed pct
0
Rows × columns
1 × 7
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 quote quality: valid, one-sided, and locked/crossed records, derived from the stored result.
ColumnTypeRangeNotes
total_updates number every row is 463,195,128
valid_two_sided number every row is 462,934,241
valid_pct number every row is 99.94 percent
one_sided number every row is 260,716
one_sided_pct number every row is 0.06 percent
locked_or_crossed number every row is 171
locked_or_crossed_pct number every row is 0 percent

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
        bid_price,
        ask_price
    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'
)
SELECT
    count() AS total_updates,
    countIf(bid_price > 0 AND ask_price > 0 AND ask_price > bid_price) AS valid_two_sided,
    round(100.0 * countIf(bid_price > 0 AND ask_price > 0 AND ask_price > bid_price) / count(), 2) AS valid_pct,
    countIf(bid_price = 0 OR ask_price = 0) AS one_sided,
    round(100.0 * countIf(bid_price = 0 OR ask_price = 0) / count(), 2) AS one_sided_pct,
    countIf(bid_price > 0 AND ask_price > 0 AND ask_price <= bid_price) AS locked_or_crossed,
    round(100.0 * countIf(bid_price > 0 AND ask_price > 0 AND ask_price <= bid_price) / count(), 2) AS locked_or_crossed_pct
FROM opts

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