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Wednesday, September 30, 2026. September is in the books, and Thursday morning starts the fourth quarter with one of the densest single days of economic data in recent memory. Here is what to watch on October 1, and why each piece matters.

The morning’s headline act is the September ISM Manufacturing PMI at 10:00 a.m. ET, StockTraderWeekly reported. This is the number that will tell us whether American factories are still expanding or slipping backward, and the stakes are unusually high. A reading above 50 confirms the expansion story that supported the Fed’s September rate hike. A reading below 50, landing in the same week as a soft August inflation print, is exactly the kind of stagflation signal the Fed has the least ability to respond to cleanly. August construction spending lands at the same hour, and the Energy Information Administration’s weekly crude oil stockpile report follows at 10:30 a.m. ET, StockTraderWeekly reported. With crude still trading above $100 a barrel on the Brent contract earlier this week, every inventory number is a data point in the inflation fight.

After the closing bell, Nike reports fiscal first-quarter earnings, and this one carries real drama. The stock sits at a 12-year low, down more than 40% this year and around 80% from its 2021 peak, with earnings per share expected near $0.44, down roughly 10% from a year ago, The Armchair Trader reported. CEO Elliott Hill needs to show that his turnaround is gaining traction beyond cost cuts, with China demand and tariffs under heavy scrutiny. Nike is also the market’s consumer-spending weather vane: if the company that sells shoes to everyone is still struggling, it says something about the American shopper that no single data point can.

Then there is the Fed, which will be talking all day. Thursday’s speaker lineup includes Governors Christopher Waller and Lisa Cook, Vice Chair Philip Jefferson, Governor Michelle Bowman, and regional presidents Thomas Barkin, Susan Collins, Alberto Musalem’s colleague Jeffrey Schmid, and Lorie Logan, FXEmpire reported. This is the first full day of official reactions to Wednesday’s softer inflation data, and markets will be listening for one thing: whether the cooler PCE print changed anyone’s mind about the October 27-28 meeting. Traders now see only a 37% chance of a hike at that meeting, down from 71% a week ago, Investopedia reported. Every word from a voter on Thursday either cements that repricing or starts to undo it.

And all of Thursday is really a warm-up for Friday. The September jobs report lands at 8:30 a.m. ET, and it is the single most important data point before the Fed’s October decision. Economists expect roughly 90,000 to 100,000 new jobs, down from 162,000 in August, with the unemployment rate holding near 4.1%, according to StockTraderWeekly and FXEmpire. A weak print alongside cool inflation hands the Fed every reason to wait. A hot print revives the October hike debate overnight.

The calendar says the fourth quarter begins tomorrow. The data will decide whether it begins with relief or with a new round of the same fight that defined September.