Telix and 4DMedical climb as BHP falls: Tuesday’s ASX moves explained

Wednesday, 16 September 2026 edition, covering the completed ASX session on Tuesday, 15 September. All share prices below are Australian-dollar closing prices. Each daily percentage compares Tuesday’s close with Monday, 14 September’s close. These are not Wednesday’s live moves, changes since the opening bell, or weekly returns. The table includes both prices so the calculation is visible rather than hidden behind a headline number.

The broad market weakened while two healthcare names moved sharply higher. The Motley Fool’s dated closing report records the S&P/ASX 200 at 8,672.5, down 0.88%. Reuters, republished by The Business Times, describes a session weighed down by commodity shares and banks, with higher bond yields and inflation worries in the background. Its rounded index decline of 0.9% is consistent with the two-decimal closing figure. These three shares are editorial selections, not a complete market ranking.

4DMedical (ASX: 4DX) rose from $3.44 to $3.74. That is a 30-cent increase divided by Monday’s $3.44 close: 8.72% after rounding. The Tuesday close agrees between the Motley Fool closing table and EODData’s dated historical rows. The latter also supplies Monday’s comparison price. Reading those dated rows matters: a quote page can contain summary fields that update at a different time from its historical table.

The closing report did not identify a fresh 4DMedical announcement that day. That is an important limit on what can be said about the rise. A strong share-price move alone does not establish a new contract, an earnings upgrade or a regulatory decision. It would be misleading to borrow another healthcare company’s announcement and present it as 4DMedical’s catalyst. Here, the price move is verified; a specific new company trigger is not established by the reviewed evidence.

Telix (ASX: TLX) climbed from $16.34 to $17.75, adding $1.41. Dividing that gain by $16.34 gives Tuesday’s 8.63% rise. Monday’s close is recorded in FNArena’s 14 September table and EODData’s Telix history; Tuesday’s close appears in the Motley Fool report. This separates the sessions clearly: the 4.28% in our previous edition described Monday, while 8.63% describes Tuesday alone. Neither number should be labelled as Wednesday’s return.

Telix’s own 14 September announcement provides the relevant recent company news. It reported US FDA approval for Pixclara, a PET imaging drug used to help distinguish recurrent or progressive glioma from treatment-related changes. That is a diagnostic milestone, not approval of a treatment that cures brain cancer. Tuesday followed that announcement, so the approval supplies context for continued interest. The announcement does not prove what motivated every transaction or guarantee future revenue.

BHP (ASX: BHP) moved the other way, from $60.59 to $59.25. The $1.34 fall divided by Monday’s close produces −2.21%. Both prices appear in EODData’s dated rows, and Swingfolio’s Tuesday closing report independently records $59.25 and −2.21%. The direction is worth checking explicitly: subtracting the previous close from the latest close produces a negative number even if a source’s summary box displays the size of the move without its sign.

Reuters reported lower iron ore prices and losses of more than 2% for both BHP and Rio Tinto, alongside broader weakness in banks. That supports a sector-level explanation for the pressure on BHP; it does not establish a fresh BHP-specific announcement as the sole cause. The distinction helps readers separate a change in the market’s economic outlook from a change disclosed by an individual business.

The useful comparison is therefore between price and evidence. Telix had a documented recent regulatory milestone, 4DMedical had a verified rise without a fresh trigger identified in the closing report, and BHP fell amid broader mining weakness. The bars visualise one session’s percentage changes on the same scale. They do not measure business quality or predict tomorrow’s result. Each source link and comparison close is provided below for checking the underlying record.