1016 | AI Debt Jitters Shake Wall Street

Mia: Welcome to the after-market briefing. I'm Mia.

Milo: And I'm Milo. We're going to walk through the tape from the last session and the stories behind it — and the thing that connects most of what we're covering today is credit. The AI trade, the bond market, the mortgage market, even household balance sheets — it all comes back to who can borrow, at what price, and whether anyone believes the debt will be paid back.

Mia: So let's start with the story everyone was asking about this week: CoreWeave. The stock got crushed. From last Friday's close to Thursday morning's 52-week lows, it fell 27.5 percent. Then it rebounded 17 percent, and equity traders holding the name are, in the words of one analysis, dazed. It's being described as an Austin Powers steamroller — a slow-moving crisis. You can see it coming from a long way off, it moves slowly, but it's very hard to get out of the way.

Milo: And the real clue to why this happened isn't in the stock chart. It's in the debt market. CoreWeave's bond yields surged, and so did its credit default swaps — those are contracts that pay out if a company fails to make its debt payments. When CDS spreads widen and bond yields jump, that's the credit market saying the risk of lending to this company has gone up. Stock investors who ignore those signals tend to get surprised.

Mia: And CoreWeave isn't an isolated case. Credit default swaps on Microsoft, Nvidia, Meta and Amazon have all been rising since 2025. Wall Street is starting to ask out loud whether the AI boom can justify the enormous amount of debt that's been piled up to build it. The Spanish-language financial press has been covering exactly this — the frenzy of AI debt unsettling the markets.

Milo: The sell-off spread through the whole AI complex. The S&P 500 slid on Friday, on track for its worst week since June, as worries about the viability of the AI trade weighed on chipmakers. The VIX — Wall Street's fear gauge — ripped above 22 for the first time in four months, and there's a cluster of trades suggesting traders think it could go even higher.

Mia: The ripples go beyond the public stocks, too. The sell-off in CoreWeave is widening the valuation spread between AI's two leaders, OpenAI and Anthropic. And there's an interesting side development: Jump Trading and DRW are committing traders and capital to an emerging market for financial contracts tied to computing power — essentially trying to make AI infrastructure tradable just as the boom faces scrutiny.

Milo: So what changed, what moved, and what's unknown here? What changed: CoreWeave down 27.5 percent to 52-week lows before a 17 percent rebound; the S&P 500 down on its worst week since June; chipmakers extending their slump; VIX above 22. Affected assets: CoreWeave itself, the semiconductors, the broad index, and the credit instruments behind them.

Mia: Why it matters: CoreWeave is a neocloud — it borrows heavily to buy the chips and data centers that AI companies rent. If the credit market reprices that risk, the whole funding model comes into question. The material uncertainty is the big open question: do credit spreads normalize from here, or is this the early signal of deeper stress in AI-related debt? Nobody knows yet, and that's what to watch — those bond yields and CDS levels.

Milo: Which brings us naturally to the broader credit market, because this week was turbulent across the board. Credit markets disrupted fundraising plans for numerous borrowers. And then, in the middle of that, Bank of America sold $8 billion of bonds in an unusual Friday high-grade offering — braving the market. That tells you something: the biggest, strongest names can still come to market, but the window is narrowing for everyone else.

Mia: Elsewhere in credit, a growing list of mortgage lenders is holding off on offerings of bonds backed by home and commercial-property loans, because investors are demanding more compensation to take on the risk amid turbulence in rates markets. Deals are being shelved, not priced.

Milo: And in the funding markets, Treasury-bill yields have risen sharply as a wave of new issuance tests investor demand — and that poses a threat to the stability of overnight funding markets. Meanwhile, Kimberly-Clark is holding investor calls ahead of a possible bond sale as its acquisition of Tylenol maker Kenvue nears closing — so issuers with clear, deal-driven reasons to borrow are still preparing, even in this environment.

Mia: What to watch here: whether overnight funding markets stay calm as T-bill supply keeps coming, and whether the mortgage bond backlog clears or grows. If Bank of America could get an $8 billion deal done on a Friday in a turbulent week, that's a data point — but it's a data point about the strongest issuers only.

Milo: Now, part of why rates markets are turbulent is macro. Let's talk oil, because Brent touched $110 a barrel for the first time since May. The driver: Iran escalated attacks in the Strait of Hormuz this week, and Ukraine vowed to hit Russian refineries. Prospects for imminent supply relief dwindled, and traders ramped up bets on higher prices heading into the weekend. U.S. crude also rose sharply on Friday.

Mia: The transmission into equities is real. Exxon signaled record refining earnings for the third quarter, because wars in the Persian Gulf and Russia have crippled fuel-making facilities and sent prices surging. So the same geopolitical event that's a headwind for the broad market is a tailwind for refiners. Russia's refined fuel shipments had already declined in early October, before the government loosened a diesel export ban.

Milo: On the rates side, Treasuries fell — yields rose — as predictions fell flat that U.S. officials would signal any reduction in long-term debt sales. The Treasury stayed silent on the long end. And the bigger backdrop: an analysis piece flags a $2 trillion federal deficit with 5 percent Treasury yields, raising borrowing costs for households and the government alike, and calling it America's biggest economic challenge.

Mia: Central banks are in the picture too. Bank of Japan Governor Ueda said Friday he "can't tolerate" underlying inflation rising further above 2 percent — reinforcing expectations of more rate hikes in Japan. Over here, Fed's Warsh withheld any signal on another hike this month but praised what he called a "synchronous tightening" by central banks against inflation.

Mia: And in the UK, the picture is resilient recent data, but labor-market figures point to near-flat conditions into early next year, with the October 28 budget expected to offer little substantive change.

Milo: What's unknown on the macro side: how long oil stays elevated. That depends on the Hormuz situation and on whether any supply relief materializes. Watch the Strait, watch refining margins, and watch whether the Treasury changes its tone on long-end issuance.

Mia: All of that — 5 percent yields, expensive energy, tight credit — lands on households. New research finds debt payments rose far faster than estimated real household income, absorbing about half of a one-earner household's gains. That's the affordability story in one number.

Milo: Money columnist Michelle Singletary has advice that cuts against conventional wisdom. She rejects the idea of "good debt" — her line is, "If debt was a person I would slap it." She supports living with parents to save money if you can, and says the key to beating the affordability crunch is knowing your numbers — what's actually coming in and going out.

Mia: This connects to politics too, because the affordability squeeze isn't hitting all voters equally. Younger Americans face higher inflation and housing costs than baby boomers, which is widening the divide ahead of the 2026 midterms.

Mia: And on housing itself, Jonathan Miller of Miller Samuel says he's not seeing people fleeing New York City, in a discussion that also covered mortgage rates and housing supply, while Brown Harris Stevens CEO Bess Freedman highlighted people losing out on home equity in the affordability conversation.

Mia: Wells Fargo economist Tom Porcelli, on the consumer side, discussed the health of the US consumer and the wealth effect — and notably described himself as incredibly hands-off with his own personal finances.

Milo: What to watch: whether the affordability divide keeps widening into 2026, because it's now a political variable, not just an economic one.

Mia: Speaking of politics — election spending. Trump-aligned groups and Elon Musk have poured hundreds of millions into the midterms, but the surge has barely moved the polls or the map. That's the striking part: the money isn't working, at least not yet.

Milo: Musk alone gave a record $158 million to the GOP's Senate Leadership Fund, which raised a record $273 million, and Republicans are pouring money into Texas to defend Ken Paxton. So the bets are concentrated, and so far the return on that spending looks thin.

Mia: And in White House news, Katie Zacharia is out as press secretary. She was on shaky ground from her first press conference, and over questions about her claims of being a lawyer despite not having passed a bar exam.

Milo: From Washington to the battlefield and orbit. Ukrainian officials complained this week that SpaceX had limited internet connectivity without advance notice. Trump says the White House did not order Starlink restrictions in Ukraine, and separately said he didn't order Starshield access limits.

Milo: Analyst Melinda Haring of the Atlantic Council called the Starshield outage — combined with Ukraine running out of Patriot missiles — "tremendously damaging" for frontline defenses, and noted that despite everything, Americans support Ukraine.

Mia: The market reaction showed up in an unexpected place: Eutelsat, Europe's answer to SpaceX, saw its shares soar 18 percent this week and kept climbing Friday, as concerns grew over Starshield's limitations in Ukraine. Investors repricing a competitor's prospects on a geopolitics headline — that's demonstrated transmission.

Milo: There's other SpaceX-adjacent news. Prediction market odds on a Tesla-SpaceX merger rose above 50 percent for early 2027 on Kalshi, after Barclays outlined how a deal could work. And Tesla unveiled the long-delayed Roadster, developed with SpaceX — a car Musk first debuted as a concept in 2017 and has missed every delivery date since. The merger speculation and the Roadster reveal feed each other.

Milo: Blue Origin, meanwhile, plans a $330 million Florida expansion to ramp New Glenn launches, targeting multiple flights per week by the end of the decade.

Mia: Two more items on the space-and-AI edge: SpaceX's AI policy leader was grilled by the New York City Council on Grok safety and sexualized images, and the Director of National Intelligence said an OpenAI Saudi national bugging case shows the threat to U.S. leadership in AI, arguing AI amplifies existing cybersecurity risks to U.S. digital infrastructure.

Milo: Let's shift to entertainment — Netflix brought in Peter Rice to run content, replacing its chief creative officer. Rice is a veteran of TV and film, with experience spanning scripted and unscripted shows, live sports, prestige television and theatrical distribution. He'll be in charge across all regions, and the company is clearly trying to spur growth and find new hits.

Mia: The open question for investors: can a Hollywood veteran revive Netflix's slate? That's unproven, and it's the thing to watch over the next few quarters. For context on this earnings season, the Investing Club flagged what it wants to see when Capital One and Meta report next week — and Meta, of course, is one of those names with rising CDS we talked about earlier, so its report lands in the middle of the AI-debt debate.

Milo: Two other consumer-facing datapoints: Apple's $1,999 foldable iPhone Duo is drawing early demand, and analysts are assessing whether it can lift iPhone pricing and revenue — a test of the company's status-symbol power. And E.l.f. Beauty CFO Mandy Fields said the company is staying true to making beauty accessible and using social media for brand awareness.

Mia: Now to Brazil, because there's a market-euphoria-versus-fundamentals story there. Flávio Bolsonaro's early success in the presidential race sparked such euphoria that investors risk overlooking a debt problem running through every corner of the economy. The numbers are stark: 9.3 million companies in arrears, and household and farmer defaults at record levels. It's a debt problem no president will be able to ignore.

Milo: Brazil isn't alone in the region. The IMF warned that Colombia's fiscal situation is unsustainable and untenable, sharpening its assessment as the new government seeks the lender's help to stabilize its accounts. And in emerging-market governance news: Turkey's stock-fixing scandal could see Turkish companies frozen out of global indexes, and Turkey's status as an emerging market is itself at risk.

Milo: Morocco appointed its football federation head as finance minister, facing narrowing fiscal room and demands for social spending ahead of co-hosting the 2030 World Cup.

Mia: A few more corporate and market items to close the loop. Oaktree's deal to buy A-Cap's insurer collapsed, and the companies are in new talks after regulators raised alarms over exposure to defunct investment firm 777 Partners. Banca Monte dei Paschi investor Goldstone, backed by Qatari money, came out in support of Intesa Sanpaolo's takeover bid.

Mia: Compass, the top US residential broker, sued California's largest real estate listing service in an escalating fight over timely access to home listings. Congo detained about 300 Chinese nationals in its copper belt in a crackdown on illegal mining. And WHG, a Brazilian asset manager founded by former Credit Suisse executives, is expanding its local equities team.

Milo: Two trade notes: the U.S. pressed China on Mastercard and Citigroup market access in bilateral talks in Bangkok, and China warned the EU not to underestimate its determination to fight on trade, dismissing claims that European pressure yielded concessions in auto talks. Also worth noting from the health space: FDA-approved sickle cell gene therapies offer new hope, but cost and access have slowed their use.

Milo: And Schwab is creating a tax-aware long-short strategy as wealthy investors flock to those approaches, adding billions.

Mia: On the sports side, the NBA is tightening betting restrictions and deploying AI to help flag suspicious wagers, according to two documents obtained by CNBC. And Phoenix Suns owner Mat Ishbia predicted his team will win a first-round playoff series — before the season has even started — while saying the UWM stock decline won't affect his team ownership.

Milo: So let's pull it together. The closing tape: S&P 500 lower, worst week since June, chipmakers weak, VIX above 22, Brent at $110, Treasury yields higher. The catalysts: AI credit fears centered on CoreWeave, geopolitical risk in the Gulf, and heavy Treasury supply. What to watch next: CoreWeave's bond yields and CDS, overnight funding stability, the Strait of Hormuz, Treasury's posture on the long end, and Meta and Capital One earnings next week.

Mia: The throughline, one more time: everything this week — the AI stocks, the oil price, the mortgage shelf, the household budgets — is a story about the price of money. When that price moves, everything built on borrowed funds reprices with it.

Milo: That's the briefing. Stay level, know your numbers, and we'll see you next session.