About ShortInterest.au

ASIC publishes short position reports (T+4). The raw CSVs are cumbersome, so we transform them into concise pages and charts, and we label the T+4 lag clearly throughout the site. ASX also releases gross short sale volumes the next business day (T+1), which we pair alongside the T+4 feed for a faster look at market pressure.

Data sources & labelling

What each label means:

• ASIC short interest (T+4): Outstanding short positions aggregated by holder. Four-business-day lag. Shown as a percent of shares on issue so you can compare across tickers.
• ASX short volume (T+1): Yesterday's gross short sale volume. Shows flow, not total open shorts. Not float-normalised, so heavy trading days can look large on liquid names.
• How to use them together: T+1 flags fresh pressure quickly; T+4 confirms whether that flow stuck and how it compares across the market.

Each page calls out which feed you are looking at, so you can pair the faster T+1 snapshot with the normalised T+4 percent-of-float view.

Methodology at a glance

• T+4: trade date plus four business days.
• Percent short estimates positions relative to shares on issue for apples-to-apples comparison.
• Updates on business days.
• Attribution is shown where relevant; raw history is cached.

What this site is not

Not a trading signal and not financial advice. It’s an educational companion for understanding how short interest evolves for ASX‑listed companies.

Attribution

Sources: ASX short selling gross data (T+1) and Australian Securities and Investments Commission (ASIC) short position reports (T+4). We transform, cache, and present this data for clarity and performance.