Updated 10/19/2026
Our Perspective on the Markets Last Week
Equity markets finished a volatile week with sharply different results across the major indexes, as heavy selling in technology contrasted with strength elsewhere. The price change of select U.S. indexes for the week was: S&P 500 (-1.95%), Dow Jones Industrial Average (+0.67%), and Nasdaq (-4.48%). The yield on the 10-year Treasury note declined 0.15 percentage points to 5.09%.
Monday and Tuesday: Markets started the week mixed as rising oil prices and concerns about AI infrastructure spending weighed on technology shares. Third-quarter earnings season began with mixed results from major banks. Despite some disappointing initial reactions, the reports generally reflected resilient consumer activity and loan demand, while financial stocks held up considerably better than technology shares. Meanwhile, reports of technological advances by a Chinese memory-chip manufacturer added selling pressure to semiconductor shares.
Wednesday: A hotter-than-expected September Consumer Price Index (CPI) report triggered a sharp selloff and increased expectations for another Federal Reserve interest-rate hike. Consumer prices rose 0.6% for the month and 3.7% from a year earlier, while core inflation increased 0.3%, exceeding expectations. The report pushed Treasury yields higher, intensifying concerns about the substantial debt being used to finance AI infrastructure. CoreWeave emerged at the center of the bull-bear tug-of-war as bond prices for both CoreWeave and Oracle declined, pushing their debt yields higher and raising questions about future financing costs. CoreWeave shares fell approximately 15%, Oracle declined nearly 9%, and the Nasdaq lost 1.88%.
Thursday: Selling continued early after producer prices rose 1.3% in September, well above expectations. However, declining Treasury yields helped bring buyers back into the market. The Nasdaq recovered from an early decline of approximately 1.4% to finish slightly higher, while CoreWeave reversed a nearly 10% decline to close approximately 6% higher, illustrating the dramatic shifts in sentiment surrounding the AI trade.
Friday: The recovery proved short-lived as selling resumed across AI-related companies and semiconductors. CoreWeave fell approximately 12%, bringing its weekly decline to nearly 25%, while the Nasdaq lost another 2.1% during the session.
The selling pressure within technology was particularly severe. Semiconductors declined 10.53% for the week, software fell 7.39%, and memory-chip stocks plunged 18.78%. The S&P 500 Momentum ETF also lost 6.79%. Meanwhile, consumer staples gained 5.02%, energy advanced 4.86%, and healthcare rose 3.45%. The selloff extends the Russell 1000 Value Index's outperformance compared to the Russell 1000 Growth Index by nearly 24 percentage points over the past year, a historically unusual difference.
The dramatic swings also illustrated how quickly investor sentiment can change. While concerns over AI spending, borrowing costs, and future profitability deserve attention, short-term selling can be amplified as investors react to headlines and follow the crowd.
Looking Ahead:
Following last week's sharp rotation, markets will be watching whether strength in value-oriented and defensive sectors broadens into other areas, or whether the selling pressure in technology and AI-related investments begins to subside. Third-quarter earnings from Meta, Tesla, Netflix, IBM, Lam Research, and others could help determine whether concerns over AI spending and future profitability are justified or have become excessive.
Developments involving Russia and Ukraine will also draw attention following the administration's decision to ease certain sanctions on Russian energy exports and reports of possible new peace negotiations. Combined with the ongoing conflict in the Middle East, these developments could have a meaningful impact on oil prices, inflation expectations, and Treasury yields.
The economic calendar includes housing starts, building permits, manufacturing and services activity reports, and consumer sentiment. With the Federal Reserve's October 27–28 meeting approaching, markets will also be watching for changes in expectations surrounding further interest-rate increases.
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Probability of an interest rate change at next FOMC meeting:
Current Target Rate is 3.50% - 3.75%
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