Alphabet Snaps Its Longest Monthly Losing Streak as AI Momentum Returns

Alphabet opened September by doing something it had not managed in a long time: it went up, and it kept going up. The stock snapped what CNBC called its longest monthly losing streak in more than a decade, and the catalyst was not a macro tailwind or a single blockbuster number.

It was a run of new AI model releases that reminded Wall Street the company is still shipping competitive products, not just spending to catch up.

The rebound, in context

The move matters because of what preceded it. For months, the market had treated Alphabet as the Big Tech name most exposed to the AI arms race and least rewarded for it, punishing the stock even as peers rallied.

The September turn suggests investors are willing to re-rate the company when it demonstrates visible progress. As the report framed it, when a company can show it is still shipping competitive AI products, the market tends to reward it. Tangible releases, in other words, beat promises.

Google Cloud is the growth engine

The clearest evidence sits in the cloud division. Google Cloud grew revenue 82 percent year over year in its most recent quarter, expanding far faster than Amazon Web Services and Microsoft Azure, the two larger incumbents.

Google Cloud still holds a smaller slice of the market, roughly 14 percent against AWS near 28 percent and Microsoft around 21 percent, but it is closing the gap at a pace neither rival is matching. That is the number that makes the AI story concrete for Alphabet: demand for its cloud and AI infrastructure is translating into revenue, not just headlines.

The endorsement extends beyond the operating results. Warren Buffett's Berkshire Hathaway now counts Alphabet among its largest equity positions, a notable signal from an investor who has historically been cautious on expensive technology names.

The other side of the trade: capex

None of this comes cheap, and a balanced view has to weigh the cost. Alphabet has raised its 2026 capital-expenditure outlook toward roughly 205 billion dollars, up from a midpoint near 185 billion, and management has signaled that spending will likely climb again in 2027.

The company recently reported negative free cash flow for the first time since going public, a direct consequence of building AI infrastructure at scale. Bulls see that spend as the price of defending and extending a cloud franchise growing 82 percent a year. Skeptics see a bill whose payback is not yet proven. Both can be right for a while, which is exactly why the stock has been volatile.

What to Watch From This News

• Cloud growth durability: whether the 82 percent pace holds, or decelerates, in the next earnings report.
• Free cash flow: how quickly heavy AI capex starts converting into cash generation rather than draining it.
• The competitive read-across to Microsoft and Amazon, whose own cloud growth rates set the bar for Alphabet.
• New model releases, which have become a near-term driver of the stock in their own right.

Bottom line

Alphabet's September rebound is a reminder that in the current market, AI credibility is earned through shipping, not spending alone. The cloud franchise gives the bull case something real to point to, and the capex surge gives the bear case something equally real to worry about.

For long-term investors, the more useful frame is not whether the stock rebounded this week, but whether the returns on all that AI investment eventually justify the outlay. Nothing here is a guarantee in either direction, and the volatility of the past few months is a fair warning that the market has not made up its mind.