Wall Street Just Survived Its Worst Week Since June. Now Earnings Season Takes the Wheel.

Last week ended with Wall Street split in two: the Nasdaq lost 4.5%, its worst week since June, while the Dow gained 0.7% for its second straight weekly win. Friday's close made the divide official — the S&P 500 fell 1.1% to 7,659.44, the Nasdaq dropped 2.1% to 26,140.03, and chip stocks fell for an eighth straight session. But money didn't leave the market; it just moved. Eight of eleven S&P 500 sectors finished the week higher, and defensive names like Coca-Cola, Walmart, and healthcare did the heavy lifting. What Happened The week's defining question was whether the AI buildout can pay for itself. Debt-funded data center spending came under the microscope, and CoreWeave — the debt-heavy cloud provider with $51 billion in liabilities — became the poster child, falling 25% for the week after its credit default swaps hit distressed levels. Memory-chip makers got routed (Micron down about 13% on the week, SanDisk about 15%), and on Friday the selloff spread to software: Twilio fell 10.6%, the biggest drop in the S&P 500, while Oracle shed 5% and approached a 52-week low. Meanwhile the Fed stopped scaring people — at least for October. Chair Kevin Warsh used his fireside chat with IMF chief Kristalina Georgieva in Bangkok to say nothing at all: "I don't prejudge meetings." Markets read the silence as dovish, cutting October-hike odds from about 27% to roughly 15%. Hot data kept coming anyway: import prices jumped 1.1% in September, the fastest in over three years, and industrial production rose 0.7%. The 10-year Treasury ended the week at 5.09%. Why It Matters The market's central question has shifted from "will the Fed hike?" to "who pays for the AI buildout?" Morgan Stanley estimates AI-related debt issuance will approach $570 billion this year — that's a lot of borrowing riding on compute turning into revenue, as Nvidia's Jensen Huang keeps insisting it has. The rotation is the counterargument to panic: when the equal-weighted S&P 500 has its best week against technology since 2009, the message isn't that the economy is breaking — it's that investors want cash flow instead of promises. Under the Hood - South Korea's Kospi had its worst week since the Lehman fallout in 2008, a reminder the chip rout is global. - The VIX closed at 19.99, its highest since late July — elevated, not panicked. - Oil closed the week over $100 a barrel (WTI at $101.41), but fell Monday morning after the U.S. eased sanctions on Russia. - China's economy beat expectations with 4.5% third-quarter growth. What Hedgehog Is Watching The Fed is now in its pre-meeting blackout, so no officials will rescue or ruin anyone's week before the October 27–28 meeting. That leaves earnings in charge — 372 companies report this week. Tuesday brings Netflix and Johnson & Johnson; Wednesday is the big one, with Meta, Tesla, IBM, and Lam Research all reporting after the close, plus Jensen Huang's keynote at Nvidia's GTC conference in Berlin. Friday's flash PMIs and the final Michigan consumer sentiment reading give the first broad look at how businesses are responding to a month of rate-hike chatter. The rotation says the market isn't broken — it's repricing one trade. Whether the AI buildout earns its keep starts getting answered Wednesday night. Sources: Investopedia (market recap, Oct. 16); CNBC (chip selloff coverage); CNN (tech selloff, Oct. 15); Reuters (Warsh remarks, China GDP, Hormuz); Detroit Free Press (week-in-review data); TipRanks (futures and earnings calendar); CME FedWatch (rate probabilities).