STRASMORE/EXPLORE 2,170 QUERIES

Weekdays in the trailing year when stocks traded but no Treasury yield printed

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 2026-08-25, from Is the Stock Market Open Today?.

as of table 2×2read in context →
Weekdays in the trailing year when stocks traded but no Treasury yield printed — 2 rows by 2 columns, computed from US exchange, SIP and OPRA data.
session_dateweekday
2025-10-13Monday
2025-11-11Tuesday
Rows × columns
2 × 2
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 Weekdays in the trailing year when stocks traded but no Treasury yield printed, derived from the stored result.
ColumnTypeRangeNotes
session_date date 2025-10-13 to 2025-11-11
weekday date Monday to Tuesday

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 stock_days AS (
    SELECT toDate(toTimeZone(window_start, 'America/New_York')) AS d
    FROM global_markets.delayed_stocks_minute_aggs
    WHERE ticker = 'SPY'
      AND window_start >= today() - 370
      AND (toHour(toTimeZone(window_start, 'America/New_York')) * 60 + toMinute(toTimeZone(window_start, 'America/New_York'))) BETWEEN 570 AND 959
    GROUP BY d
    HAVING count() >= 100
)
SELECT toString(d) AS session_date,
       formatDateTime(d, '%W') AS weekday
FROM stock_days
WHERE d <= (SELECT max(date) FROM global_markets.treasury_yields)
  AND d NOT IN (SELECT date FROM global_markets.treasury_yields WHERE date >= today() - 370)
ORDER BY d

Run your own version of this

The same 22 years of US equities and 12 years of options data are queryable in SQL or plain English. A free account runs 100 queries a day and takes no card.

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