A day after Wednesday’s Federal Reserve decision – the first interest rate hike since July 2023 – US indices are rallying sharply. For both the S&P 500 (+0.9%) and the Nasdaq 100 (+1.5%), this marks one of the strongest market opens in recent weeks.
Figure 1: Treemap for Nasdaq 100 (17.09.2026)
Source: XTB Research, 17.09.2026
This is by no means an intuitive move. However, the stock market is receiving firm support today from a drop in 10-year US Treasury yields (down by a full 1.6%). We attribute this movement both to easing concerns regarding the FOMC’s loss of independence and to falling crude oil prices.
Figure 2: 10-Year US Government Bond Yields (06.2026 - 09.2026)
Source: XTB Research, 17.09.2026
A barrel of Brent crude oil is currently trading at just over $103, representing a fall of around 5% from the local highs recorded earlier this week. This decline is supported, among other factors, by the rerouting of a portion of Saudi crude oil exports previously transported via the East-West pipeline through Oman. Investors also welcomed assurances from the US side that the damaged pipeline is expected to resume operations within the next few days.
Figure 3: Brent and WTI Crude Oil (2026)
Source: XTB Research, 17.09.2026
Concurrently, investor and public attention is focused on an AI safety summit convened by King Charles III in the UK, where speakers included Nvidia CEO Jensen Huang.
As noted earlier, at the open, the Nasdaq 100 is up by approximately 1.5%, whilst the S&P 500 gains 0.9%. The Dow Jones posts more modest gains (+0.4%). The semiconductor sector, which is highly sensitive to bond yields (a key factor in discounting future cash flows), is performing particularly well, with the popular SOXX index up by over 3% today.
Figure 4: Winners and Losers in the Nasdaq 100 (17.09.2026)
Source: XTB Research, 17.09.2026
Markets Digest the Hawkish Fed Meeting
Wednesday’s rate hike triggered a modest and ultimately short-lived sell-off on Wall Street. For investors, restoring faith in the Fed’s independence and effectiveness proved more important than the increase in borrowing costs. Confidence has returned that the central bank will manage to rein in inflation, which ultimately led to a drop in bond yields across the entire curve.
This environment benefits not only equities but precious metals as well. Gold is up over 2% today to around $4,360 per ounce, whilst silver has surged by more than 4% to $65.7.
Figure 5: Gold (17.09.2026)
Source: XTB Research, 17.09.2026
Bank of England Refrains from Following Fed’s Lead
The Fed’s decision was not the sole major monetary policy event this week. The Bank of England kept interest rates on hold today and opted for a very gradual balance sheet reduction, resulting in a marked drop in 10-year gilt yields.
Overnight, the Bank of Japan will announce its interest rate decision. Failure to raise rates to 1.25% would be viewed as a major surprise by the markets.
Figure 6: USDJPY (2026)
Source: XTB Research, 17.09.2026
Nvidia CEO Calls for Rigorous Testing
Against the backdrop of market events, an AI safety summit convened by King Charles III took place in Scotland, attended by Jensen Huang (Nvidia), Demis Hassabis (Google DeepMind), Sarah Friar (OpenAI), and Tino Cuellar (Anthropic), among others. Huang urged AI developers to rigorously test their systems and halt the deployment of products that are not sufficiently safe.
The meeting followed a widespread debate sparked by a weekend essay from Anthropic CEO Dario Amodei calling for a slowdown in the development of the most advanced AI models – a proposal supported by OpenAI CEO Sam Altman. Huang, however, spoke against additional regulation of the sector.
Although the AI safety debate is not the main driver of valuations today, tech companies in the Magnificent 7 group are posting solid gains – Nvidia and Amazon are up by over 2%, whilst Tesla, Alphabet, and Microsoft gain over 1%.
Company News
Fluence Energy ($FLNC.US)
Shares in the energy storage provider are down by over 15% following a downgrade to its full-year revenue guidance, which analysts attribute to production bottlenecks.
Generac ($GNRC.US)
Shares in the generator manufacturer are surging nearly 20% today. The company signed an agreement with an Amazon-affiliated entity to supply data centre generators valued at approximately $8 billion.
CoreWeave ($CRWV.US)
The AI cloud computing provider launched a new funding round comprising a $3 billion convertible bond issuance and arrangements for a potential equity offering.
Pegasystems ($PEGA.US)
Shares in the software developer are down more than 2% today after JPMorgan downgraded its rating to Neutral, citing weaker growth prospects following a meeting with the company's management.
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Michał Jóźwiak, Financial Markets Analyst at XTB
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