US equity markets remained largely stable on Wednesday after the Federal Reserve decided to keep interest rates unchanged. The S&P 500 edged up 0.1 per cent, supported by strong corporate earnings in the AI and healthcare sectors.

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The 3.75 to 4 per cent stalemate

The Federal Reserve opted to maintain its main interest rate within the current range of 3.75 per cent to four per cent , a move that aligned with the expectations of most Wall Street analysts. According to the report, this decision kept the S&P 500 within 1.1 per cent of its all-time high,while the Dow Jones Industrial Average climbed 107 points, or 0.2 per cent, by mid-afternooon Eastern time.

The stability in the broader indices masks a fragile balance. While the Nasdaq composite dipped 0.1 per cent, the overall market sentiment remained buoyed by the Fed's reluctance to further increase borrowing costs, which typically weigh on stock valuations and economic growth.

SK Hynix and the 2030 memory chip demand

Artificial intelligence stocks found a new floor this week, led by a massive 10.9 per cent surge for South Korea's SK Hynix in Seoul. The memory chip manufacturer reported a "virtuous cycle" of increasing AI adoption and explicitly projected that demand for its products would continue to exceed supply through 2030, as reported in the source.

This optimism spilled over into US markets, where Micron Technology rose 4.3 per cent. The rally for Micron Technology and SK Hynix suggests that investors are currently prioritizing long-term AI infrastructure growth over immediate concerns regarding the high cost of borrowing used to fund data center construction.

Nelson Peltz's $7.35 bid for Wendy's

Individual corporate catalysts provided significant offsets to weaker sectors on Wednesday. Wendy's shares jumped 14.6 per cent to US$7.05 after Trian Fund Management, led by investor Nelson Peltz, proposed a cash acquisition of the fast-food chain at $7.35 per share.

Other companies beat quarterly forecasts to drive gains; GE HealthCare Technologies surged 8.1 per cent on the back of strong profit and revenue, while Etsy climbed 5.9 per cent. etsy CEO Kruti Patel Goyal noted that the platform saw its first growth in active buyers in two years. These gains helped mitigate losses from Robinhood Markets, which sank 4.1 per cent, and Boston Scientific, which fell 3.6 per cent due to a disappointing profit forecast.

Brent crude at $111.59 and the Treasury yield spike

The bond market reacted sharply to geopolitical instability, with the 10-year Treasury yield climbing to 5.03 per cent and the two-year yield rising to 4.77 per cent. as the report indicates, these yields are reacting to a spike in energy costs, with Brent crude oil climbing two per cent to reach $111.59 per barrel.

This trend echoes a period of volatility triggered by the war with Iran, which previously pushed the 10-year Treasury yield toward a peak of 5.30 per cent earlier this month. The current rise in oil prices creates a paradoxical environment for the Federal Reserve: while they have paused rate hikes, external inflationary pressures from the Middle East continue to push Treasury yields toward their highest levels since 2002.

The divide between Lisa Cook and the Fed majority

Despite the official pause, a significant internal rift exists within the Federal Reserve's policymaking committtee. Fed officials Lisa Cook and Beth Hammack both voted against the majority, instead advocating for a quarter of a percentage point increase to the federal funds rate.

The source does not specify the exact reasoning provided by Cook and Hammack for their dissent, leaving it unclear whether they believe inflation is more persistent than the rest of the committee assumes. This internal disagreement, coupled with the rising cost of Brent crude, suggests that the current rate plateau may be more precarious than the steady S&P 500 suggests.