Why Short Interest Data Is Always Two Weeks Old

Why is short interest data always old? Short interest — the number of shares actually held short — is measured only twice a month, on FINRA-scheduled settlement dates (mid-month and month-end), and then published on a lag of days to weeks. So the freshest short-interest print you can ever have describes the market as it stood one to six weeks ago. That is not a data vendor failing; it is how the disclosure regime works — and it is measurable.

The measured lag, settlement by settlement

SELECT toString(settlement_date) AS settlement,
    toString(toDate(min(_ingest_time))) AS first_available_here,
    dateDiff('day', settlement_date, toDate(min(_ingest_time))) AS publication_lag_days,
    uniqExact(ticker) AS tickers
FROM global_markets.stocks_short_interest
WHERE settlement_date >= toDate('2025-07-01') AND settlement_date <= toDate('2026-06-30')
GROUP BY settlement_date
ORDER BY settlement_date DESC
LIMIT 10

Across the last ten settlements, the gap between the settlement date and the day the data first appeared here ran from 10 days (the 2026-03-31 print) to 45 days (the 2026-01-30 print). The most recent settlement on file, 2026-06-15, took 16 days to arrive. Each print covers roughly 22178 tickers.

The print that isn't there yet

SELECT
    (SELECT count() FROM global_markets.stocks_short_interest
     WHERE settlement_date > toDate('2026-06-15') AND settlement_date <= toDate('2026-06-30')) AS rows_after_jun15,
    (SELECT toString(max(settlement_date)) FROM global_markets.stocks_short_interest
     WHERE settlement_date <= toDate('2026-06-30')) AS latest_settlement_on_file

Writing on July 4, 2026, the end-of-June settlement shows 0 rows — it has not been published yet, and given the measured lags above, that is normal, not late. The latest complete picture of June's short positioning is the 2026-06-15 print. The June recap carries this same disclosure inline; this page is regenerated when the print lands, and the panel above is its own tripwire — a non-zero first column means it arrived.

What the lag does to the numbers you read

Two practical consequences. First, any "short interest" figure in the news describes positioning at the last settlement, not today — during the lag window, positions can change without the number moving. Second, days-to-cover (short interest divided by average daily volume) mixes a weeks-old numerator with whatever volume denominator the source chose; treat it as a dated ratio, not a live one. Daily short VOLUME is the near-real-time cousin — published next day — but it measures marked-short trading flow, mostly market-maker plumbing, not held-short positions. The two answer different questions on different clocks.

FAQ

When are the settlement dates?

Twice a month: mid-month and month-end, on FINRA's published schedule (settlement follows the trade date by one business day, so month-end settlements land on or near the last trading day).

Can short interest be estimated between settlements?

Vendors sell daily estimates built from flow data; they are models, not disclosures. The disclosed number only exists twice a month.

Where does this page's lag number come from?

From the warehouse's own ingest timestamps — when each settlement's rows first appeared here — so it measures the full pipeline a reader actually experiences, not just FINRA's official publication date.

Check the current state of the settlement calendar yourself — both panels run as-is on the Strasmore terminal.