US market news

Riding the AI rollercoaster: Wall Street faces twists as Oracle and Nvidia steal the show

Denila Lobo
September 15, 2025
2 minutes read
Riding the AI rollercoaster: Wall Street faces twists as Oracle and Nvidia steal the show

It was the sort of trading day that keeps brokers glued to their screens and investors double-checking their notifications. The US stock market, fresh off last week’s record highs, opened with more anticipation than action. All eyes zeroed in on the legends of technology, Oracle, Nvidia, and Microsoft, while traders waited for word from the Federal Reserve. In these moments, small moves in price reveal seismic shifts in the world’s business psyche. Stories emerged, heroes took their bows, and the market became a stage for both innovation and uncertainty.

The Oracle-Nvidia partnership: AI's new gold rush

No tale stands out quite like Oracle’s. Hardly a newcomer, Oracle stunned the market by briefly adding over $50 billion to its value in a day, buoyed by contracts that put it squarely at the heart of the artificial intelligence revolution. Yet, as quickly as euphoria arrived, caution followed, Oracle slid 5% the next session. It’s a classic reminder, as Sabrina Parys of Nerdwallet puts it: “The technology sector often teeters between gravity-defying gains and sobering corrections”.

This tension is supercharged by Oracle’s partnership with Nvidia. Nvidia makes the AI chips; Oracle provides the digital real estate that AI models, like those behind ChatGPT—need to thrive. Larry Ellison, Oracle’s founder, recently joked that he’d “begged Nvidia’s Jensen Huang for more GPUs” just to keep up with client demand. The result: Oracle has become more than a cloud provider, it’s now a linchpin in the AI supply chain.

As the Economic Times points out, “Investors are treating Oracle less like a legacy software giant and more like a critical piece of the AI gold rush supply chain.” Yet, the risks are real. Many of Oracle’s big contracts are tied to firms like OpenAI, betting on future profits rather than present ones, a dynamic reminiscent of the late 1990s dot-com boom.

Line graph showing Oracle stock price movement from September 8 to 15, 2025.

Investors and analysts weigh the risks

On days like today, watching the leaderboard can feel like riding a rollercoaster. Smaller stars like IonQ surged 18% by noon; Warner Bros. Discovery leapt nearly 17%. Meanwhile, the broader market paused, everyone bracing for the Federal Reserve’s crucial policy update.

Andrew Slimmon, Senior Portfolio Manager at Morgan Stanley, believes the mood is understandable: “We’ve had strong earnings and robust fundamentals, but valuations are starting to look stretched. The Fed’s next move could set the tone for the rest of the year”. This echoes the views of the James Investment Research team, who note, “Should rate cuts materialise, the technology sector stands to benefit most, but the backdrop is more complex than usual”.

Bond yields, inflation data, and the hint of more rate cuts hang over the proceedings like summer clouds, leaving markets cautious but hopeful. The AI boom shows no signs of slowing, but with memories of previous bubbles lingering, the mood remains a blend of excitement and wariness, proof that in finance, every triumph comes twinned with a test of nerve.

So, as dusk falls on Wall Street, a new chapter of market drama is already being written: one where old-tech meets new, stories reverse in a single trading day, and the next move by the Fed could redefine the game yet again.

Bar chart illustrating daily percentage gains for Oracle, Nvidia, IonQ, and Warner Bros. Discovery

Disclaimer: The views and recommendations made above are those of individual analysts or brokerage companies, and not of Winvesta. We advise investors to check with certified experts before making any investment decisions.

Disclaimer: The views and recommendations made above are those of individual analysts or brokerage companies, and not of Winvesta. We advise investors to check with certified experts before making any investment decisions.

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