AMD stock jumped another 3.5%. AMD notched an ninth-day winning streak on Friday, rising 28% over the period. It’s the stock’s longest run of gains since since February 2020, when it also rose for eight straight trading days.

It is the ninth straight session of gains — the longest winning streak since one of the same length that ended Feb. 19, 2020, according to Dow Jones Market Data.

The recent stock gains come in the relative absence of AMD-specific news. Rather, investors seem increasingly upbeat about the prospects for AMD’s business of selling central processing units for use in artificial-intelligence servers, a booming category lately. Wall Street is upbeat that the company will be able to raise prices in response to strong demand.

Intel also plays into the server CPU boom, and investors should get more information about just how strong momentum is in that market when Intel reports its fourth-quarter results after Thursday’s closing bell.

“I would buy AMD before [Intel] for server price hikes,” Mizuho trading-desk analyst Jordan Klein said in a Thursday note to clients.

AMD is close to being sold out of its server CPUs for the year, KeyBanc analyst John Vinh said in a note earlier this week. That dynamic could lead the chip maker to raise average selling prices by 10% to 15%.

The server chip momentum also recently led Bernstein analyst Stacy Rasgon to lift his estimates for AMD’s fourth-quarter revenue ahead of next month’s earnings report. The Bernstein team is modeling for sales of AMD’s Epyc processors to grow 30% this year.

Despite momentum for Intel’s CPUs, however, Vinh said there’s still uncertainty over how competitive AMD’s graphics processing units will be compared with Nvidia’s. When AMD hosts its next earnings call, investors will be listening for more information about the production timeline for the company’s first rack-scale solution, Helios, and the Instinct MI455 series of GPUs, Vinh said.

OpenAI is so far the only major customer for AMD’s Helios rack, and the company’s status as a serious AI player depends on how that partnership works out, Rasgon said, adding that AMD also needs more meaningful customers for its AI offerings.

As investors wait for AMD’s partnership with OpenAI to kick off in the second part of this year, Rasgon said the chip maker could see benefits in the short term from the server boom and from market-share gains.