Broadcom Inc. (AVGO) shares climbed in after-hours trading Wednesday, and the reason has everything to do with what Alphabet Inc. (GOOG) (GOOGL) just told investors about its spending plans.

When Your Customer Opens the Checkbook Wide

Alphabet reported fourth-quarter earnings after the bell Wednesday, beating expectations with revenue of $113.83 billion and adjusted earnings of $2.82 per share. Those numbers were solid, but the real attention-grabber was the company's capital expenditure guidance for 2026: between $175 billion and $185 billion.

To put that in perspective, analysts had been expecting around $115 billion in spending this year, according to Reuters citing LSEG data. That's not a modest upward revision—it's a massive signal about how much money is about to flow into data centers, AI hardware, and cloud infrastructure.

"We're seeing our AI investments and infrastructure drive revenue and growth across the board," Google said in its earnings release.

Why This Matters for Broadcom

Here's where Broadcom enters the picture. Google isn't just a customer—it's a huge customer of Broadcom's ASIC business, which supplies high-performance, application-specific chips for hyperscalers. Specifically, Broadcom helps design and manufacture Google's tensor processing units (TPUs), the specialized AI chips the company uses for its internal AI infrastructure.

Broadcom has been involved in every generation of Google's TPU AI chips, handling design translation, high-speed interfaces, packaging, and more. When Alphabet says it's going to dramatically increase capital spending on AI infrastructure, that translates directly into more business for Broadcom.

The momentum is already showing up in Google's numbers. Alphabet reported that Google Cloud revenue increased 48% year-over-year in the fourth quarter. CEO Sundar Pichai added some context: "Our first party models, like Gemini, now process over 10 billion tokens per minute via direct API use by our customers, and the Gemini App has grown to over 750 million monthly active users."

The Technical Picture

Broadcom shares were trading up 6.73% at $328.73 in extended trading at the time of publication Wednesday, according to market data.

From a technical standpoint, Broadcom's RSI currently sits at 38.94, which is neutral but leaning toward oversold territory. Key support is at $321.50, while resistance is around $340. If the stock tests support and fails to hold, it could signal a continuation of the recent downtrend. A break above resistance, on the other hand, might indicate a potential reversal is underway.