What is the T+4 delay on ASIC short position data?

ASIC publishes short position data with a four trading day delay, mandated by Regulatory Guide 196. A position held at close of business on day T appears in ASIC's dataset on T+4. This delay is outside Shorted's control; every Shorted page shows the actual ASIC report date, not the date we received it.

How is short interest percentage calculated?

Short interest % = reported short positions divided by total product in issue, multiplied by 100. Both numerator and denominator come directly from ASIC; Shorted republishes the percentage as reported, without recalculation.

How far back does Shorted's coverage go?

Historical coverage begins 1 June 2010, when ASIC first published daily aggregated short position data following post-GFC reforms. All ASX-listed securities included in the ASX Approved Short Sell Products list are covered.

Methodology

Q: Where does Shorted.com.au get its short position data?

All short position data is sourced directly from the Australian Securities and Investments Commission (ASIC) short position reports. ASIC aggregates individual net short position reports submitted under section 1020AC of the Corporations Act 2001 (Cth) and publishes daily totals for ASX-listed securities.

Q: What is the reporting threshold for ASIC short positions?

Short positions are only reportable above 0.01% of a company's total issued capital or A$100,000, whichever is less. Positions below this threshold are not included in ASIC's published dataset and therefore do not appear on Shorted.

How Shorted ingests, validates, and publishes short position data for ASX-listed securities. Updated 22 April 2026.

Data source

All short position data published on Shorted.com.au is sourced directly from the Australian Securities and Investments Commission (ASIC) short position reports. ASIC aggregates individual net short position reports submitted by holders under section 1020AC of the Corporations Act 2001 (Cth) and publishes daily totals broken down by ASX-listed product.

Historical price data is sourced from ASX end-of-day feeds. Company metadata (name, industry, sector, market capitalisation) is maintained in our own database and periodically enriched from public sources including ASX company announcements, ASIC company records, and third-party reference data.

The T+4 delay

ASIC publishes short position data with a four trading day delay. A position held at the close of business on day T appears in ASIC's published dataset on day T+4. This delay is mandated by ASIC Regulatory Guide 196 and is not within Shorted's control. Every page on Shorted shows the report date the data corresponds to, not the date we received it.

Practical consequence: the "latest" short position figure on any stock page is a snapshot as of four trading days ago. Market- moving events inside the T+4 window are not yet reflected.

Reporting threshold

Short positions are only reportable above a threshold set out in ASIC Regulatory Guide 196: 0.01% of a company's total issued capital, or A$100,000, whichever is less. Positions below this threshold are not included in ASIC's published dataset and therefore do not appear on Shorted. A stock with "0%" or "—" on our interface means there were no reportable short positions, not necessarily that no short positions exist.

How short interest % is calculated

The short interest percentage we display is the ASIC-reported figure, calculated as:

short_interest_% = reported_short_positions / total_product_in_issue × 100

Both the numerator (aggregated reportable short positions) and the denominator (total shares on issue) are supplied by ASIC. We do not recompute the percentage; we republish it as reported so our figures match ASIC's source data exactly.

Derived metrics

Where Shorted displays derived metrics not published by ASIC, the calculation is stated below:

Days to cover = reported short positions ÷ average daily trading volume (20-day simple average).
1-week delta = current short % − short % on the ASIC report five trading days prior.
Industry aggregates = share-weighted average of short % across stocks classified in the same industry, using issued-shares weighting unless stated otherwise.

Refresh cadence

Our pipeline runs once per ASX trading day, typically within 60 minutes of ASIC publishing a new daily report. Stock pages, screener, top-shorts ranking, and industry treemap refresh with the new data automatically. Weekly reports generate each Monday morning Australian Eastern Time using the previous week's ASIC reports.

Coverage

Shorted covers all ASX-listed securities included in the ASX Approved Short Sell Products list and therefore eligible for short reporting under RG 196. Historical coverage begins 1 June 2010, when ASIC first published daily aggregated short position data following post-GFC reforms.

Corrections and restatements

ASIC occasionally restates historical short position figures. When a restatement is published we overwrite the affected dates in our database and do not retain the superseded values, so Shorted always reflects the current ASIC record. If you believe a figure on our site is incorrect, email [email protected] with the stock code and date and we will investigate.

Limitations

Short positions below the 0.01% / A$100,000 threshold are not reported and cannot be inferred from our data.
The T+4 delay means data is not real-time and should not be used to time trades.
Ticker changes, consolidations, and delistings can interrupt time-series continuity; we attempt to maintain a stable stock code mapping but cannot guarantee historical joins in all cases.
AI-generated commentary (weekly reports, enrichment summaries) is derived from the underlying data and public sources and should be treated as analysis, not advice — see our disclaimer.

References

Questions about methodology? Email [email protected]. See also our disclaimer.