Why Magellan, Medadvisor, Origin Energy, and Pointsbet shares are tumbling today

These shares are ending the week in the red. But why?

The S&P/ASX 200 Index (ASX: XJO) is on course to end the week on a high. At the time of writing, the benchmark index is up 0.75% to 8,556.6 points.

Four ASX shares that have failed to follow the market higher today are listed below. Here's why they are falling:

A man sits in despair at his computer with his hands either side of his head, staring into the screen with a pained and anguished look on his face, in a home office setting.

Image source: Getty Images

Magellan Financial Group Ltd (ASX: MFG)

The Magellan share price is down a further 8% to $10.49. This is the second day in a row that the fund manager's shares have fallen heavily. On Thursday, Magellan announced a number of executive and investment team changes. This includes the exit of Gerald Stack from his role as Head of Investments after 18 years with the firm. It notes that Stack has been Magellan's Head of Investments for more than a decade and over the past two years has contributed to important initiatives to strengthen the Investment Team. Magellan advised that Stack "now feels the business has the stability and direction it needs for the future and will take some time off before pursuing his next opportunity."

Medadvisor Ltd (ASX: MDR)

The Medadvisor share price is down almost 3% to 18 cents. This appears to have been driven by a broker note out of Bell Potter. Its analysts have downgraded this medtech company's shares to a hold rating (from buy) and slashed the price target on them to 21 cents (from 40 cents). This follows the release of a very disappointing quarterly update which fell well short of expectations.

Origin Energy Ltd (ASX: ORG)

The Origin Energy share price is down 4.5% to $10.70. Investors have been selling this energy company's shares following the release of its second quarter update. Although there were a lot of bright spots in the update, these were overshadowed by a downgrade to Australia Pacific LNG (APLNG) production guidance. Its FY 2025 production guidance for APLNG is now 670–690 petajoules (PJ). This is down 2% to 3% from its previous forecast of 685–710 PJ. This reflects lower-than-expected benefits from well optimisation efforts at Condabri, Talinga, and Orana, as well as reduced performance from non-operated assets and unplanned maintenance.

Pointsbet Holdings Ltd (ASX: PBH)

The Pointsbet share price is down 17% to 81 cents. This has been driven by the release of the sports betting company's quarterly update. Pointsbet posted a quarterly total net win of $69.9 million, which was flat on the prior corresponding period. It also revealed that its normalised EBITDA was negative $3.3 million for the first half.

Motley Fool contributor James Mickleboro has no position in any of the stocks mentioned. The Motley Fool Australia's parent company Motley Fool Holdings Inc. has positions in and has recommended MedAdvisor and PointsBet. The Motley Fool Australia has no position in any of the stocks mentioned. The Motley Fool has a disclosure policy. This article contains general investment advice only (under AFSL 400691). Authorised by Scott Phillips.

More on Share Fallers

Codan share price A dismayed kid dressed as a scientist stands with his back to a rocket crashed into the ground
Share Fallers

Xero shares crash to a 7-year low after a brutal sell-off

The decline has wiped out years of share price gains.

Read more »

Two miners at a mine site on their tablets, with mining machinery behind them.
Share Fallers

Why has the Mineral Resources share price fallen 12% this week?

It’s been another tough week for Mineral Resources shareholders.

Read more »

A man holds his hand to his chin with a furrowed brow, making an expression of puzzlement or confusion.
Share Fallers

Top 3 ASX 200 shares now below their 200-day moving average

Are these businesses still a buy?

Read more »

A young man clasps his hand to his head with a pained expression on his face and a laptop in front of him.
Share Fallers

What are the most shorted ASX shares on the market right now?

Two names, two opposite bear cases.

Read more »

An arrow crashes through the ground as a businessman watches on.
Share Fallers

Warning: Corporate Travel shares have crashed 80%. What on earth just happened?

An 80% crash has left investors asking what went so wrong.

Read more »

Stressed businessman sits in panic amid digital stock market financial background.
Share Fallers

The five worst-performing ASX 200 shares in August unmasked

Investors sent these five ASX shares crashing 17% to 23% in August. But why?

Read more »

Stressed businessman sits in panic amid digital stock market financial background.
Share Fallers

Why Megaport, Lendlease and JB Hi-Fi shares all crashed 14% to 15% this week

ASX investors punished Lendlease, Megaport, and JB Hi-Fi this week. But why?

Read more »

Woman checking out new laptops.
Consumer Staples & Discretionary Shares

Down 14% today: Are JB Hi-Fi shares now a bargain-bin buy?

Could JB's plunge mean a bargain buy?

Read more »