NEW YORK: Yahoo is a big company with a much smaller one struggling to get out. A 22.5 per cent stake in Alibaba accounts for well over half the US internet group’s roughly $36 billion market capitalisation, according to a new Breakingviews calculator. With the Chinese e-commerce giant likely to go public next month, Yahoo Chief Executive Marissa Mayer will find out how investors value the businesses she actually runs.

Alibaba is worth around $130bn before any new money is raised, based on its latest published internal valuation. Assuming Yahoo eventually pays tax at 30pc on its gain above the small original cost, the post-tax value of its stake is more than $20bn. Yahoo’s other Asian holding, a 35.5pc interest in Yahoo Japan, is worth a bit more than $6bn after tax.

Within Yahoo’s enterprise value, after deducting net cash, of around $33bn, that leaves the company’s own businesses worth a little over $6bn. And two years into Mayer’s tenure, total revenue is still shrinking, second-quarter financials showed earlier this month.

Yahoo recently negotiated downward the maximum number of Alibaba shares it has to sell in the initial public offering. But offloading just over a quarter of its holding will still bring in more than $5bn after tax, more than doubling Yahoo’s stash of cash and marketable securities.

Mayer has managed to get search-related revenue growing again, by 2pc year-on-year in the second quarter using the standard accounting definition. She needs to maintain that, despite being locked into a stagnant partnership with software giant Microsoft, while also rescuing display ads, where the top line declined 8pc. Acquisitions offer some hope of growth. For instance, buying internet upstart Tumblr for $1.1bn last year injected social media credibility, though not obviously much revenue.

Mayer has sensibly promised to return at least half the post-tax Alibaba proceeds to shareholders. While rivals like Facebook splash cash on big, risky acquisitions, the Yahoo shambles Mayer inherited and has not yet fully fixed calls for some skepticism. Once Alibaba has its own US listing and investors don’t need to buy Yahoo as a proxy, the value attributed to the search and display businesses will be easier to quantify. That will put Mayer under a narrower, brighter spotlight.

Published in Dawn, August 3rd, 2014