ASOS has spent years looking like the poster child for what happens when online fashion loses its cool and its grip on costs at the same time. Now, the retailer is giving investors a reason to look twice.

A sharp jump in first-half profitability sent the shares flying, suggesting the turnaround may be starting to stitch together. The catch is that fashion turnarounds are easy to promise and very hard to sustain.

ASOS said first-half adjusted EBITDA rose by roughly 50% year on year, helped by better gross margins, lower return rates and tighter cost control. The group’s adjusted gross margin rose 330 basis points to 48.5%, while total fixed costs fell by more than 10%.

The market liked that. Shares jumped as much as 16% in early London trading, their biggest rise in four months, after a bruising run that had left the stock down heavily over the past year.

There was still plenty of mess under the surface. Gross merchandise value fell 9% in the half, though management said the pace of decline improved sequentially and trends got better across core markets including the U.K., U.S., Germany and France. The company also pointed to improving new customer growth and stronger performance in womenswear.

Chief executive José Antonio Ramos Calamonte said the company was making progress across its turnaround priorities: more relevant product, a better shopping experience and a leaner operating model. ASOS reiterated full-year guidance for adjusted EBITDA of £150 million to £180 million (about $200 million to $240 million), with sales trends expected to improve through the year.

Because this is not really about one set of numbers. It is about whether ASOS can prove it still belongs in a market that has moved on without it.

For a while, ASOS looked stuck in an awkward middle ground. It was not cheap enough to beat Shein and Temu. It was not premium enough to escape constant discounting. And it was not efficient enough to make money from the volumes it was pushing through the system. That is a brutal place to be.

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So the margin improvement matters. It suggests ASOS is finally getting the basics right. Retail turnarounds are rarely about big strategic pivots. They are about fixing the plumbing. Buying better. discounting less. shipping smarter. handling returns more efficiently. It is unglamorous, but it is where profits live.

Returns, in particular, are a silent killer in online fashion. Every returned parcel eats into margins, logistics and inventory planning. If ASOS is getting that under control, it is not a small win. It is central to whether the business can become structurally profitable again.

Womenswear strength is another signal worth watching. This is the core of ASOS’s identity and customer base. If that category is performing well, it suggests the company is regaining some relevance with its audience, which has been drifting toward faster and cheaper alternatives.

But the wider context is unforgiving. The fast-fashion landscape has changed. Shein has rewritten the rules on price and speed. Temu has pushed even further down the cost curve. Meanwhile, traditional retailers have improved their own online capabilities. ASOS is no longer competing in a space it defined. It is competing in a space that has outgrown it.

That is why investors remain cautious. Profitability is improving, but sales are still falling. The company is becoming leaner, but it is not yet growing again. And in retail, shrinking profitably can only take you so far before the question becomes whether the brand still has momentum.

Still, this update changes the tone. For the first time in a while, ASOS looks like it is stabilizing rather than sliding. It is moving from damage control to early-stage recovery. That is not a victory lap. But it is a necessary first step.

The next phase is about balance. ASOS needs to rebuild growth without undoing the margin gains that are driving the turnaround narrative.

Management is betting that better product, improved customer experience and more disciplined operations can bring shoppers back in a more sustainable way. If new customer growth continues and sales trends keep improving quarter by quarter, confidence in the recovery will build.

For now, ASOS is not back. But it’s no longer clearly broken.

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