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Monday, Wednesday, Friday expirations: distinct option roots carrying an expiry on each weekday

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 Which Stocks Have Daily Options?.

as of series 5×3read in context →
Monday, Wednesday, Friday expirations: distinct option roots carrying an expiry on each weekday — 5 rows by 3 columns, computed from US exchange, SIP and OPRA data.
weekdayroots_with_expirycontracts_mm
1 Monday363.4
2 Tuesday140.6
3 Wednesday4033.5
4 Thursday143.6
5 Friday501995.7
Rows × columns
5 × 3
Period covered
to
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 Monday, Wednesday, Friday expirations: distinct option roots carrying an expiry on each weekday, derived from the stored result.
ColumnTypeRangeNotes
weekday date 1 Monday to 5 Friday
roots_with_expiry number 14 to 5,019
contracts_mm number 0.6 to 95.7 count

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 weekday,
       uniqExact(root) AS roots_with_expiry,
       round(sum(vol) / 1e6, 1) AS contracts_mm
FROM (
    SELECT substring(ticker, 3, length(ticker) - 17) AS root,
           toDateOrNull(concat('20', substring(ticker, length(ticker) - 14, 6))) AS expiry,
           multiIf(toDayOfWeek(toDateOrNull(concat('20', substring(ticker, length(ticker) - 14, 6)))) = 1, '1 Monday',
                   toDayOfWeek(toDateOrNull(concat('20', substring(ticker, length(ticker) - 14, 6)))) = 2, '2 Tuesday',
                   toDayOfWeek(toDateOrNull(concat('20', substring(ticker, length(ticker) - 14, 6)))) = 3, '3 Wednesday',
                   toDayOfWeek(toDateOrNull(concat('20', substring(ticker, length(ticker) - 14, 6)))) = 4, '4 Thursday',
                   '5 Friday') AS weekday,
           toFloat64(volume) AS vol
    FROM global_markets.options_minute_aggs
    WHERE window_start >= now() - INTERVAL 8 DAY
)
WHERE expiry >= today() - 3 AND expiry <= today() + INTERVAL 30 DAY
GROUP BY weekday
ORDER BY weekday

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