FINRA off-exchange short volume by session: coverage and marked-short share

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 2026-07-26, from Market Recap: Week of June 29, 2026.

Rows × columns

4 × 4

Period covered

2026-06-29 to 2026-07-02

Computed

2026-07-26

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

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 2026-07-26, and the query below is what returned them.

SELECT toString(date) AS d,
    uniqExact(ticker) AS tickers_on_file,
    max(ticker) AS alphabetical_end,
    round(100 * sum(toFloat64(short_volume)) / sum(toFloat64(total_volume)), 1) AS marked_short_pct
FROM (
    SELECT date, ticker, any(short_volume) AS short_volume, any(total_volume) AS total_volume
    FROM global_markets.stocks_short_volume
    WHERE date >= toDate('2026-06-29') AND date <= toDate('2026-07-02')
    GROUP BY date, ticker
)
GROUP BY date
ORDER BY date