Wall Street split down the middle on Monday, 12 October 2026, and the split told a familiar story: the Dow Jones Industrial Average kept climbing while technology-heavy indexes ran into trouble. The blue-chip Dow rose 195.60 points, or 0.38%, to close at 51,850.55 — its third straight positive day. The S&P 500, meanwhile, fell 0.06% to end at 7,807.24, and the Nasdaq Composite lost 0.44% to finish at 27,245.90.
Two forces did most of the damage to the broader market: a sharp drop in memory chip stocks and another leg higher in oil prices. Neither was enough to knock the Dow off its stride, but together they kept the S&P 500 pinned just below the flatline after a winning week for all three major averages.
Why the Dow rose while tech struggled
The divergence inside Monday’s session came down to a handful of individual movers. Salesforce shares gained 2% after the software company received a double upgrade at Bank of America, giving the 30-stock Dow a meaningful lift. The index is price-weighted, so a strong day from one of its larger components goes a long way.
On the other side of the ledger, Micron Technology fell 3.9% and dragged the Nasdaq lower with it. The selloff followed news that China’s CXMT, a rising memory chip maker, reported progress on a new chip structure — a development investors read as a competitive threat to established memory producers. MarketWatch noted that memory-chip makers slid broadly as the CXMT news circulated through the sector.
There were bright spots outside the chip complex. Bumble shares skyrocketed roughly 50% after The Wall Street Journal reported deal talks, according to MarketWatch’s live coverage. Apple also spent the session nearing the $5 trillion market value threshold once again, a reminder of how concentrated much of this market’s strength remains.
Oil prices surge after a shaky ceasefire announcement
Crude was the week’s first macro headache. Over the weekend, President Donald Trump announced what he called an “energy ceasefire” between Russia and Ukraine. Any relief that announcement offered to oil markets did not last long: Ukrainian President Volodymyr Zelenskyy said Moscow had already violated the deal, and traders bid energy higher anyway.
West Texas Intermediate futures advanced 2.06% to close at $93.74 per barrel. Brent crude gained 1.84% to settle at $106.65 per barrel. Both benchmarks remain elevated, and the geopolitical backdrop behind them grew more complicated as the session went on.
Trump also told reporters he was considering joining Saudi Arabia in its fight against the Tehran-backed Houthis in Yemen, after another deadly attack on Riyadh’s international airport. Those remarks raised the prospect of escalating tensions in a region that sits at the heart of global energy supply.
Market analysts were skeptical that the ceasefire would calm anything. One strategist quoted in MarketWatch’s coverage argued that the Russia deal may paradoxically threaten efforts to lower diesel prices, while another analyst said flatly that Trump’s diesel deal with Russia “will mean little, and the energy ceasefire will mean nothing.” Energy stocks, for their part, climbed to within reach of a record as oil rallied.
Earnings season arrives with big expectations
With the Middle East turmoil rumbling in the background, investors are now leaning on corporate results to keep the rally alive. The third-quarter reporting season ramps up in earnest this week, and the big banks lead the way: Bank of America, Citigroup, Goldman Sachs, JPMorgan Chase, Morgan Stanley and Wells Fargo are all scheduled to post results.
The bar is high. According to FactSet’s John Butters, the S&P 500 is set to post 29.6% earnings growth for the quarter. That would mark the fourth straight quarter in which the broader index has delivered above-25% earnings growth, a run fueled largely by the strength of the AI data center buildout.
Tim Holland, chief investment officer at Orion, framed the week plainly in comments to CNBC: “It’s going to be all on earnings.” He added that even if this week’s inflation prints come in hotter than expected, the market is likely to treat them as “not enough to derail” the Federal Reserve, which per the CME FedWatch tool is largely expected to keep interest rates steady at its next meeting.
Holland also pointed to the force that has carried this market: “Something will upend this bull market at some point, but I think the most important thing going on right now is the AI capex build-out.”
Inflation data takes center stage midweek
Earnings are only half of this week’s calendar. The September consumer price index is due out Wednesday, with the producer price index following on Thursday. Those two reports will give investors their clearest recent read on inflation just as the Fed weighs its next move on rates.
On the rates front, there was a note of calm to start the week. Cleveland Fed President Beth Hammack said long-term Treasury rates remain “modest,” according to MarketWatch’s live coverage, and a strategist there noted the yield situation looked better than it did last week — even if the Russia oil deal could complicate the effort to bring diesel prices down.
Gold traders got their own headline to chew on, with Jefferies suggesting a short squeeze in gold could be coming. The metal has been a favored haven during the recent stretch of geopolitical risk, and any squeeze would only add fuel.
A bull market turns four
It is easy to forget, amid the daily noise of chip selloffs and ceasefire announcements, just how long this run has lasted. This week marks four years since the start of the S&P 500’s bull market, which began after the index notched a closing low of 3,577.03 in October 2022. Since then, the index has more than doubled — a fact that puts Monday’s 7,807.24 close in perspective.
The momentum coming into the week was real. All three major averages posted a winning week last week, with the Dow and S&P 500 each notching their second positive week in three. The Nasdaq netted its fourth straight week of gains, as a rally in tech stocks helped investors shrug off higher oil prices and yields.
Whether that momentum survives the week may depend on two things the market cannot control: what banks say about the health of the economy, and what the inflation data says about the path of interest rates. For now, investors are betting the AI-driven earnings machine keeps humming — and that the Fed stays put.
What to watch this week
- Bank earnings: Bank of America, Citigroup, Goldman Sachs, JPMorgan Chase, Morgan Stanley and Wells Fargo all report this week.
- Inflation: September CPI arrives Wednesday; the producer price index follows Thursday.
- Fed expectations: Per the CME FedWatch tool, the central bank is largely expected to hold rates steady at its next meeting.
- Oil and geopolitics: WTI closed at $93.74 and Brent at $106.65 on Monday, with the Russia-Ukraine “energy ceasefire” already in doubt after Zelenskyy said Moscow violated it.
- Memory chips: CXMT’s reported progress on a new chip structure will keep pressure on Micron and its peers.
Monday’s session was a study in rotation rather than retreat. Money moved out of memory chips and into energy, the Dow absorbed the gains, and the S&P 500 held its ground to within six basis points of flat. If earnings land as FactSet expects, the bulls will argue the four-year-old rally has plenty left in the tank. If they do not, the oil price surge and the chip competition from China will look a lot more threatening in hindsight.
FAQ
How did the Dow Jones close on Monday, 12 October 2026?
The Dow Jones Industrial Average rose 195.60 points, or 0.38%, to close at 51,850.55, its third straight positive day. The S&P 500 fell 0.06% to 7,807.24 and the Nasdaq Composite lost 0.44% to 27,245.90.
Why did Micron stock fall on Monday?
Micron Technology shares dropped 3.9% as investors assessed increasing competition from China’s CXMT, which reported progress on a new chip structure.
Why did oil prices rise despite the Russia-Ukraine ceasefire announcement?
President Trump announced an “energy ceasefire” between Russia and Ukraine over the weekend, but Ukrainian President Volodymyr Zelenskyy said Moscow had already violated it. West Texas Intermediate futures rose 2.06% to $93.74 per barrel and Brent crude gained 1.84% to $106.65 per barrel.
Which companies report earnings this week?
Bank of America, Citigroup, Goldman Sachs, JPMorgan Chase, Morgan Stanley and Wells Fargo are all scheduled to post results this week as third-quarter earnings season ramps up. FactSet’s John Butters expects the S&P 500 to post 29.6% earnings growth for the quarter.
When is the September CPI report due?
The September consumer price index is due Wednesday, with the producer price index following on Thursday.