Major Indexes Rebound as AI Spending Supports Growth, but Small Caps and Bond Yields Raise Questions

Published October 9, 2026

Weekly Index Performance

+1.2%
S&P 500 (Week)
+0.9%
Dow Jones (Week)
+0.6%
Nasdaq (Week)
$4,216.30/oz
Gold

The Major Indexes Recovered, but Small Caps Were Left Behind

The S&P 500 closed Friday at 7,811.54, gaining +1.2% for the week, while the Dow Jones Industrial Average advanced +0.9% to 51,654.95. The Nasdaq Composite finished at 27,366.17, rising +0.6%, while the Russell 2000 declined -0.9% to 2,806.98. The S&P 500 reached a record closing high earlier in the week before pulling back and recovering on Friday. That divergence matters because the largest companies continue to support the broader market while smaller businesses remain under pressure, suggesting that investors are still being selective rather than embracing risk across the board.

Treasury Yields Remained a Major Obstacle

The 10-year Treasury yield finished Friday around 5.24%, down approximately 3 basis points from the previous week's 5.28%, after climbing above 5.3% earlier in the week. Investors continued weighing the Federal Reserve's restrictive policy stance against persistent inflation concerns, elevated energy costs, and substantial borrowing requirements. The Fed's September meeting minutes reinforced the importance of inflation risks and the possibility of additional tightening, even as the bond market recovered from its earlier selloff. For equities, the central issue remains unchanged: companies must deliver enough earnings growth to justify their valuations while investors can earn comparatively attractive yields in government bonds.

AI Spending Continued to Shape Sector Leadership

Artificial intelligence remained one of the market's strongest investment themes, but the week's trading also demonstrated how sensitive the sector has become to expectations. Reports questioning OpenAI's projected revenue triggered selling in semiconductor and AI infrastructure stocks, even as other technology companies helped the Nasdaq recover by Friday. Constellation Energy gained +12.3% during Tuesday's session after announcing a major nuclear-power agreement with Alphabet, highlighting the growing importance of electricity supply in the AI infrastructure buildout. The opportunity is expanding beyond semiconductor manufacturers into power generation, utilities, industrial equipment, and the infrastructure required to operate increasingly large data centers.

Oil and Gold Reflected Competing Macro Pressures

WTI crude settled Friday at $91.85 per barrel, gaining +0.8% for the week, as geopolitical uncertainty and concerns about energy supply continued influencing prices. December gold futures finished at $4,216.30 per troy ounce, rising +1.3% as investors balanced elevated Treasury yields against geopolitical risks and demand for defensive assets. Oil remained particularly sensitive to developments involving Iran, Russia, and potential disruptions to global energy flows. Neither commodity moved dramatically on a weekly basis, but both continued reflecting an environment where inflation risks and geopolitical uncertainty remain important considerations for long-term investors.

Wealth Catcher Takeaway: Earnings Must Justify the Valuations

We see a market where strong corporate earnings expectations and AI infrastructure investment continue supporting the major indexes, even as elevated Treasury yields and uneven market breadth create vulnerabilities. The S&P 500's +1.2% weekly gain is encouraging, but the Russell 2000's -0.9% decline suggests the strength has not spread evenly across the economy. Wealth Catchers is watching the upcoming bank earnings reports, inflation releases, Treasury yields, and whether AI spending translates into sustainable revenue and free cash flow for the businesses financing this expansion. Our focus remains on business quality, reasonable valuations, and whether the underlying fundamentals justify the market prices investors are paying.

Notable Movers

The following are individual session moves, not weekly returns.

TickerMoveWhy
CEG+12.3% TuesdayTuesday's gain followed a nuclear-power agreement with Alphabet supporting AI data-center demand.
TMUS-13.2% FridayT-Mobile declined Friday after SpaceX's spectrum acquisition raised concerns about future wireless competition.
TDeclined FridayAT&T fell Friday as investors reassessed competition from SpaceX's planned Starlink Mobile expansion.
VZDeclined FridayVerizon declined Friday on concerns that satellite-based mobile connectivity could challenge established carriers.
CCIAdvanced FridayCrown Castle rallied Friday as investors anticipated additional infrastructure opportunities from expanding satellite-mobile services.
HUMApproximately +12% FridayHumana advanced Friday following stronger-than-expected Medicare Advantage quality ratings.

Key Takeaways

  • The S&P 500 gained +1.2% to 7,811.54, while the Dow advanced +0.9% to 51,654.95 and the Nasdaq Composite rose +0.6% to 27,366.17.
  • The Russell 2000 declined -0.9% to 2,806.98, showing that small-cap stocks continued to lag the major large-cap indexes.
  • The 10-year Treasury yield finished near 5.24%, approximately 3 basis points lower for the week, keeping borrowing costs and equity valuations in focus.
  • WTI crude gained +0.8% to $91.85 per barrel, while December gold futures rose +1.3% to $4,216.30 per ounce.
  • T-Mobile fell -13.2% on Friday following SpaceX's spectrum deal, while Crown Castle advanced, illustrating how a single industry development can create sharply different outcomes for related businesses.

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