Completeness probe: FINRA short-volume file coverage, June 26-30

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 Microstructure Deep-Dive: June 29, 2026.

Rows × columns

3 × 6

Period covered

2026-06-26 to 2026-06-30

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
    date,
    uniqExact(ticker) AS tickers,
    min(ticker) AS first_ticker,
    max(ticker) AS last_ticker,
    countIf(ticker = 'TSLA') AS tsla_rows,
    round(100 * sum(short_volume) / sum(total_volume), 2) AS short_pct_of_reported
FROM global_markets.stocks_short_volume
WHERE date BETWEEN '2026-06-26' AND '2026-06-30'
GROUP BY date
ORDER BY date