The S&P 500 has been making a run at a new bull market this year, and after pausing for a breather, the rising trajectory continues. The index -- which tracks the performance of 500 of the largest publicly listed companies in the U.S. -- jumped nearly 6% during the week ended Nov. 3, its best performance thus far in 2023.

Yet this year's rally has been remarkably selective. In fact, nearly half the stocks in the index are actually in the red for the year. Most market watchers agree that what's fueling the uneven rally is the fervor surrounding recent advancements in artificial intelligence (AI). It's largely a case of those companies that have exposure to AI and those that don't.

Further muddying the water is the lopsided opportunity to profit from AI, with just a few companies right now positioned to reap most of the benefits -- at least over the short term.

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Source Fool.com