The price of heating oil is spiking this winter...
October 08, 2026View Online | Sign Up | Shop
Newsletter Logo

Presented By

Sponsor Logo: The Motley Fool

This is your captain speaking. PSA: Do not dial in to your Zoom on an airplane. With in-flight wi-fi becoming the norm, reports are growing of people taking meetings in the sky. But the etiquette here is much clearer than the polarizing question of whether it’s ok to recline your seat—no one wants to involuntarily come along to your all-hands unless it’s the meeting where the tension between Jane from HR and Brad from accounting finally boils over.

—Matty Merritt, Dave Lozo, Molly Liebergall, Abby Rubenstein

In today’s newsletter, we’ll get into:

  • ChatGPT becoming a math whiz
  • Why heating your house might cost more this winter
  • Bots stealing comedians’ bits on Insta

Markets

Nasdaq

27,538.69

S&P

7,801.77

Dow

51,179.87

10-Year

5.277%

Bitcoin

$83,331.94

WeBull

$5.89

Data is provided by

*Stock data as of market close, cryptocurrency data as of 5:30pm ET. Here's what these numbers mean.

  • Markets: Stocks fell yesterday morning as bond yields reached for the heights, but they managed to pare their losses later in the day after a reassuring 10-year Treasury bond auction brought yields down some.
  • Stock spotlight: It was not a bullish day for WeBull. The investment platform plummeted after a US congressional panel highlighted its ties to China’s government.

DOES NOT COMPUTE

ChatGPT solved more math, is that a good thing?

Illustration of a robot spewing a beam of mathematical formulas and diagrams at a mathematician who is trying to speak.

Niv Bavarsky

All this complicated math and no one was left sobbing at the kitchen table. This week, OpenAI dumped solutions to 372 of the world’s previously unsolved problems across number theory, algebraic geometry, topology, and other fields most of us have no business trying to understand. The release has mathematicians spiraling as AI models power through problems some have spent their lives working on.

In “C+ in Pre-Calc” terms…this may be one of the biggest advancements in mathematics history, and it was announced via a blog post. OpenAI’s 722 pages of findings included advancements in three of the five Millennium Prize Problems, notoriously difficult math problems that come with a $1 million prize if you solve them.

The field of mathematics was already riled up about AI. Last month, OpenAI said it solved the Navier-Stokes Equation, one of the Millennium Problems. OpenAI said it wouldn’t claim the money, but that didn’t quell the drama surrounding the development.

  • Mathematicians are concerned these powerful models have been trained on their research, creating a conundrum over whether the AI is actually thinking through complex problems creatively or just plagiarising at super speed.
  • And the AI’s proof used a controversial loophole and an “approach that many experts find unnatural,” according to Scientific American.

Is this all just marketing?

AI companies previously used high school math problems (still hard!) as benchmarks for their models, but as their LLMs advanced in sophistication, so have the equations.

But it still looks pretty good as a headline when their models can solve a problem that has stumped humans for nearly a century.

Your professors are probably mad about this: Mathematicians have warned that the speed racing of research is detrimental to the field—even the independent AI math advisory board OpenAI brought on after the initial controversy has told the company to stop trying to solve math problems. Twenty-five winners of the Fields Medal (the most prestigious award in the discipline) signed a letter on Sept. 25 accusing AI companies of rushing to publish uncredited proofs, warning this could push mathematicians to keep their research private, which would impede progress.—MM

Sponsored By The Motley Fool

If cash back is king, this card is royalty

Sponsor: The Motley Fool

Ready to make the most of your money? The credit card experts at The Motley Fool have spoken: 2027 is going to be the year of the one-card wallet.

If cash back is king, this card is royalty. Get a 0% intro APR into 2028 on purchases and balance transfers and earn cash back on every purchase. You read that right—every purchase.

And you can earn up to 6% cash back in categories you’ll actually use. So whether you’re looking to save money or make the most of your rewards in 2027, this card can help you cross it off your list.

Here’s what you need to know.

World

Tour de headlines

Photo of Kevin Warsh, a light-skinned man with short dark brown hair wearing a blue suit, makes a concerned face in front of federal reserve flags.

Win McNamee/Getty Images