AI Bubble Warning: 45% of Fund Managers Alarmed

Samantha: Welcome to The State of Tech, The European Edition, Friday August seven, 2026. I'm Samantha Lawrence.

Bob: And I'm Bob Russell. Today: growing warnings of an AI investment bubble, the EU AI Act's transparency rules going live, a twenty-seven million dollar grant for an AI micro-robot that treats blood clots, new US tariffs on the raw material behind chips and solar panels, and to close out, two things you can actually use today: the free open-source photo library LibrePhotos, and the encrypted European email service Tuta Mail. Let's start with those bubble warnings.

Bank of America survey shows 45 percent of fund managers now call AI the market's biggest tail risk.

Samantha: We're opening with a warning that's getting louder by the week. A fresh Bank of America survey shows that forty-five percent of global fund managers now see an AI bubble as the single biggest risk to markets. Just a few months ago, that number was eleven percent. So this is a very sharp jump in a very short time, and it's coming from the people who actually move serious money around.

Bob: And the reason they're nervous is the gap between what's going in and what's coming out. Global AI investment is projected to top two and a half trillion dollars in 2026. Enterprise AI revenue, meanwhile, is running at around one hundred billion. That's roughly a twenty-five to one ratio between spending and income. More than half of the managers surveyed say AI stocks are already in bubble territory, and they're urging investors to look harder at the fundamentals.

Samantha: What's notable is who's saying it. This isn't a lone contrarian analyst, it's a mainstream bank survey of professional investors. The comparison being drawn in the market is with the late-nineties dot-com run, where the technology was real and transformative, but the valuations still ran way ahead of the revenue. The bottom line here is that even people who believe in AI long-term think the near-term prices don't add up.

Bob: For Europe, this matters in two ways. First, valuations. A lot of European tech firms trade in the slipstream of US AI names, so a correction in New York would land in Amsterdam, Frankfurt and Paris within hours. Second, funding. European AI startups have been benefiting from the same optimism, and if the venture capital taps tighten globally, that money gets much harder to raise on this side of the Atlantic too. The other angle to watch is pension funds. European retirement money is quietly exposed to US tech giants through index funds, so a sharp correction there shows up in ordinary people's pension statements.

The EU AI Act's transparency rules take effect, but the tough high-risk obligations are pushed to December 2027.

Samantha: Moving on to Brussels, where a big chunk of the AI Act just went live this week. From now on, any AI system that interacts with people has to disclose that it's an AI. And AI-generated content, images, audio, video and text, has to be identifiable as artificial. So chatbots have to say they're chatbots, and synthetic media needs some form of label.

Bob: But, and this is the part that's getting a lot of attention, the heavier obligations for so-called high-risk AI systems have been pushed back to December 2027. That covers AI used in biometrics, in hiring and employment, and in essential public services. Those are exactly the areas where campaigners have been pushing hardest for guardrails, and now companies get an extra window before the strictest rules kick in.

Samantha: The Commission's argument is that the technology is moving so fast that the detailed technical standards simply aren't ready yet. Critics counter that a delay is a delay, and that citizens are being exposed to high-stakes AI decisions without the promised safety net. What this shows is the classic tension in tech regulation, moving fast enough to matter, without locking in rules that are obsolete on day one.

Bob: For European users, the immediate change is visible. Expect to see more "this content was generated by AI" labels on social platforms and in customer service chats. For companies, the compliance work splits in two: a set of concrete transparency tasks to complete this year, and a much bigger high-risk compliance programme to plan for by late 2027. And for European startups, there's a real strategic question, do you build for the stricter rules now, or wait, betting that the standards will shift again before the deadline.

Samantha: Quick interruption. If you listen to The State of Tech regularly, hit that like button and subscribe, that way you'll never miss an episode. Okay, moving on.

Stanford wins up to twenty-seven million dollars to build an AI-guided micro-robot that swims through the bloodstream.

Bob: Now to a genuinely striking medical story out of Stanford. Researchers there have been awarded up to twenty-seven point two million dollars over five years by ARPA-H, the US health research agency, to develop an AI-powered micro-robot that can travel through a patient's bloodstream. The device, called M3bot, is designed to treat blood clots and aneurysms from the inside.

Samantha: The clever bit is the mechanics. The robot uses a single spinning motion for two jobs at once. That spin propels it through the blood vessels, and it also mechanically compresses and shrinks a clot on the spot, reportedly by more than ninety-five percent. So instead of using drugs to dissolve a clot, or open surgery to remove one, you'd have a tiny untethered device physically breaking it down where it sits.

Bob: This matters because stroke and aneurysm care today often depends on getting a catheter to exactly the right spot through the body's plumbing, and some parts of the vascular system are simply too small or too twisted to reach. An autonomous micro-robot, guided by a surgeon but not physically tethered, could get to places current tools can't. That opens up treatment for patients who today have very limited options.

Samantha: For Europe, stroke is one of the leading causes of death and long-term disability, and stroke care has been a major focus for hospital investment across the continent. If Stanford's approach makes it through the years of clinical trials that lie ahead, European hospitals and med-tech firms will be watching very closely. It also fits a wider pattern, AI moving from software into physical devices that interact with the human body directly. That shift will keep landing on European regulators' desks, from CE marking to hospital procurement rules.

Trump administration slaps a 15 percent tariff and price floors on polysilicon, the raw material behind chips and solar panels.

Bob: For our fourth story, we're leaving AI aside and looking at trade. The White House has enacted a new set of measures on polysilicon, the raw material used to make both semiconductors and solar panels. There's a fifteen percent tariff, and, importantly, minimum import prices, so-called price floors, on polysilicon and on the products made from it, ingots, wafers, cells and modules.

Samantha: The measures are being introduced under Section 232 of the Trade Expansion Act, which is the national-security lever US administrations have been using more and more. The stated aim is to protect US polysilicon producers from Chinese competition. The rules take effect on December 4, and they come alongside an incentive programme for companies willing to build polysilicon capacity inside the United States.

Bob: The scope here is what makes it a big deal. Polysilicon sits at the very start of two of the most strategically important supply chains on the planet, chips and solar. So this isn't just about panels on rooftops, it's also about the wafers that eventually become processors. When you put a price floor on the raw material and everything derived from it, you're reshaping the economics of both industries at once.

Samantha: For Europe, the effects are mixed. On solar, Europe has been importing enormous quantities of low-cost Chinese modules, and a US shift could redirect some of that flow back toward European markets, which could push prices down here in the short term. On chips, the story is more complicated. European fabs depend on globally sourced polysilicon too, and tariffs of this kind tend to trigger retaliation, which can drag in unrelated industries. Brussels has its own Chips Act and its own solar strategy, and this US move will feed straight into that debate about how much strategic autonomy Europe actually wants to pay for.

Two practical picks to close the week, a free photo library that keeps your memories at home, and an encrypted European email service.

Bob: To close out, two things you can actually try today, and we're keeping both away from the big AI cloud services. The first is LibrePhotos. It's a free, open-source photo library that runs on your own computer or home server, and it does the clever stuff you'd normally expect from Google Photos or Apple Photos, but without sending your images anywhere.

Samantha: What LibrePhotos does is scan through your photo collection and organise it automatically. It recognises faces, so you can browse by person. It identifies objects and scenes, so you can search for "beach" or "birthday cake" and it finds them. And it uses the location data in your photos to pin them to a map, so you can see everywhere you've been over the years. All of that happens locally, on your machine, not in someone else's data centre.

Bob: The typical setup is on a home NAS, one of those small always-on storage boxes many people already have, or on an old laptop repurposed as a mini server. Users often describe it as the moment their photo library finally feels usable again after years of just piling up on phones. It's genuinely free, community-maintained, and it works across Windows, Mac and Linux. For anyone in Europe who has been uneasy about handing two decades of family photos to a US cloud provider, this is a serious option to look at.

Samantha: The catch to be honest about is that it takes a bit of technical patience to set up. This is not a one-click app for your phone, it's software you install and configure. But there are step-by-step guides in the LibrePhotos community, and once it's running, the maintenance is minimal. If you have a teenager in the house who likes tinkering with computers, this is a great weekend project. And the payoff is a searchable, face-recognising photo library that belongs entirely to you.

Tuta Mail is the encrypted European email service that keeps your inbox out of advertisers' hands.

Bob: And the second pick is Tuta Mail, spelled T-U-T-A. It's an encrypted email service based in Germany, and it's a serious alternative for anyone who has been thinking about moving away from Gmail or Outlook, especially in Europe where data protection is a genuine everyday concern.

Samantha: The core promise is straightforward. Your emails are encrypted end-to-end when you send them to other Tuta users, and even the metadata, so the subject lines and the address book, is encrypted on Tuta's servers. That's different from most mainstream email providers, where the content might be encrypted in transit but is still readable on the server side. Tuta's servers are in Germany, which means the data is covered by European privacy law.

Bob: There's a free tier that gives you one gigabyte of storage and a Tuta address, which is enough for a lot of personal use, and paid tiers add your own domain name, more storage, and a calendar. Reviewers consistently praise Tuta for being genuinely easy to use, which is not always the case with privacy tools. It has apps for iOS, Android, Windows, Mac and Linux, plus a normal web interface, so it fits into everyday life without much friction.

Samantha: The practical way to try it is to sign up for the free tier and use it for one specific thing, maybe your online shopping, or newsletter subscriptions, or family emails. That way you see how it feels in daily use without committing your entire digital life to it on day one. And for people who care about keeping European data in Europe, under European law, this is one of the cleanest options available today. That's it for this week's picks.

Samantha: Today we covered: warnings of an AI investment bubble from the world's biggest fund managers, the EU AI Act's transparency rules taking effect while the tough obligations get pushed to 2027, Stanford's AI-guided micro-robot for treating blood clots, new US tariffs on polysilicon rippling through chip and solar supply chains, and two things to try yourself: LibrePhotos and Tuta Mail.

Bob: Want to know more or react? Visit stateoftech.eu or email us at info@doorzetters.net.

Bob: State of Tech, the tech world in 15 minutes.