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S&P 500 Logs Best Day Since August on Tech Strength

By Stocks Desk · 2026-09-17 · 2 min read
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Illustration: Tradingbird

Technology sector performance drove the S&P 500 to its largest gain since early August, reversing a three-day losing streak. The rally was supported by falling oil prices and a drop in bond yields, which alleviated pressure on equity valuations following a hawkish Federal Reserve decision.

U.S. equities posted their strongest single-day performance since August 4 on Thursday, with the S&P 500 climbing 1.1% to recover from a three-day decline. The Nasdaq Composite led the charge, surging 1.7% to its best daily gain in nearly two months. The Dow Jones Industrial Average advanced 0.6%, while the Russell 2000 rose 0.55%. This breadth of gains marked a significant shift from the previous session, where stocks and bonds had fallen in unison following the Fed's hawkish policy stance.

The recovery was primarily fueled by the technology sector, which accounts for approximately 40% of the S&P 500's market capitalization. Tech stocks rose 2.2%, providing the majority of the index's point gains. Consumer Discretionary was the only other sector to post a gain exceeding 1%, while Staples and Financials remained relatively flat. This sector rotation helped push the S&P 500 and Nasdaq back into positive territory for the month, according to Dow Jones Market Data.

Yield and Oil Relief

Macro conditions improved significantly as the 10-year Treasury yield dropped more than 7 basis points to 4.93%, breaking an eight-day rising streak. Simultaneously, crude oil prices eased for a second consecutive day, with WTI settling near $102 and Brent trading under $105. This was the first back-to-back loss for these contracts this month. The decline in energy costs and bond yields reduced inflationary pressure, creating a more favorable environment for equity valuations.

Fed Policy Expectations Adjust

Market participants are recalibrating their expectations for future Federal Reserve actions. Strategists noted that while the recent Fed decision was hawkish, the current pricing for multiple rate hikes in 2027 appears excessive. There is a growing consensus that the next move in bond yields is likely downward, supported by economic data that will ultimately dictate policy direction. This shift in sentiment suggests that investors are becoming more constructive on duration, anticipating that yields will leak lower in the coming weeks.

Despite the relief rally, volatility risks remain tied to geopolitical developments in the Middle East. Elevated oil prices could translate into higher retail costs, embedding inflation into consumer prices and complicating the Fed's mandate. However, the current easing of crude prices has temporarily alleviated this pressure, allowing equity sentiment to stabilize. The market is now focused on whether this relief is sustainable or if inflationary headwinds will resurface, impacting corporate margins and growth trajectories.

Based on reporting by TheStreet Pro, compiled by the Tradingbird desk.

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