theSIGNAL SCIENCE
19 October 2026
"The first principle is that you must not fool yourself, and you are the easiest person to fool."
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Science

The Chipmaker That Pays Its Own Customers

Nvidia funds the firms that buy its chips, and analysts are asking how much of the AI boom is real demand.

Picture a baker who lends you money to buy her bread, then reports your purchase as proof that business is booming. Strange? Welcome to circular financing, and it is now spreading through artificial intelligence. The pattern is simple.

A chip supplier invests in a customer, such as a data center builder. The customer spends that money on the supplier's chips. Both companies report growth. One central bank analysis found that 55.

2% of investments in AI firms came from other AI firms. Microsoft, Amazon, Google and Nvidia have all adopted some version of the method. Nvidia sits at the centre of the web. It will put US$30 billion into a funding round for OpenAI, and offer a guarantee of up to US$105 billion for an OpenAI data center in Ohio.

It has also committed up to US$10 billion to Anthropic, and bought US$2 billion in shares of cloud provider CoreWeave.

Photo: Taylor Vick / Unsplash
Rows of servers in a data center, the hardware at the heart of the AI build-out.
Discuss
  • Why might circular financing make it harder for investors to judge real demand for AI products?
  • Nvidia invests in customers who then buy its chips. Is this smart strategy, or a warning sign?
  • Firmus dropped its stock market listing plans. What might that suggest about investor confidence in AI infrastructure?
Science

A Cartoon Dog Heads for Mars

A cartoon dog's name is flying to Mars. Idefix, borrowed from Asterix's canine sidekick, is a small rover aboard Japan's MMX probe, launched from Tanegashima. Its job: scout Phobos before the mothership lands and grabs at least ten grams of dust. Are Mars's moons captured asteroids, or debris from an ancient collision? Japan, Europe and America want to know.…
  • If Phobos dust reveals how Mars's moons formed, what else about our solar system changes?
∞
Only when the tide goes out do you discover who has been swimming naked.
Warren Buffett, chairman of Berkshire Hathaway
Science

The Price Tag on a Newborn

Four in five American parents say having a baby costs too much. Car seats, diapers, formula, child care: the list is long, and the bill arrives fast. Among parents of children aged three and under, two in five say they are struggling or just getting by, according to a Michigan poll. Almost all agree the early years shape lifelong health. So which policy do parents want most? Paid leave, backed strongly by nearly three in four. Many countries guarantee it already.…
  • If paid leave is so popular with parents, what stops governments from adopting it?
AMERICAS · Science
Mysterious brain activity under anesthesia challenges what we know about consciousness
GLOBAL · Science
A fungus is threatening the world’s food supply. Scientists just found a new defense
ASIA · Science
World's oldest shipwreck discovered off coast of Turkey
EUROPE · Science
The uranium cubes that exposed Nazi Germany’s nuclear failure
theSIGNAL IN THE LAB
1VOCABULARY
circular financingopacity
propping upguaranteescout
debrispaid leave
2GRAMMAR FOCUS
Inversion after negative adverbials (Not only did..., Hardly had..., Never..., Rarely..., Little...)
When a negative or restrictive adverbial opens a sentence, the auxiliary verb moves before the subject, as in 'Not only did Nvidia invest in OpenAI...' or 'Hardly had the probe launched when...'. With 'Hardly/No sooner', the other clause follows with 'when' or 'than'.
did · had · than · when · has · would · Little · Rarely
  1. Not only Nvidia invest in OpenAI, but it also offered a guarantee for a data center in Ohio.
  2. Hardly Firmus announced its raise when it abandoned plans to list on the stock exchange.
  3. No sooner had the MMX probe left Tanegashima people began discussing what Phobos might reveal.
  4. Rarely a cartoon dog travelled so far from home as Idefix is about to do.
  5. Under no circumstances investors easily tell real demand from borrowed demand.
  6. Never before so many AI firms depended on money from one another.
3IDIOMS
Define each idiom in your own words. Then write one in a sentence of your own.
  1. to prop up (something)
  2. to be at the centre of the web
  3. the bill arrives fast
  4. to get by
  5. to rewrite the story / the book
4CRITICAL THINKING
The articles describe three very different kinds of spending: companies funding their own customers, governments funding space probes, and parents funding the first years of a child's life. Who should decide which of these is worth the money, and what evidence should they use? Consider whose interests are protected, and whose are overlooked, when the costs and benefits are hard to measure.
5CREATIVE · HEADLINES
Write a headline for the top story in each of the following styles. One line each, no explanation:
  • TABLOID NEWSPAPER
  • LUXURY MAGAZINE
  • ACTIVIST BLOG
6WRITING
Imagine you are the baker from the opening of the first article, writing a short letter to a customer you have been lending money to. Explain, in your own voice, why you are changing the arrangement, and what you hope will happen next.
7DEGREES OF EXTREMITY
Complete each ladder from mild to strong.
  • costly→→
  • struggling→→
  • unclear→→
  • growing→→
  • curious→→
  • popular→→
8SPEAKING
  1. Would you rather work for a company that bends accounting rules or takes risks?
  2. Which feels riskier to you: investing in new technology or keeping savings in a bank?
  3. A cartoon dog is on a Mars mission. Does naming equipment after fictional characters matter?
  4. What would make you feel truly financially secure when starting a family?