Friday saw an intensification of the sell-off in semiconductor stocks, pushing the sector that has led this year's market rally towards bear market territory. Concerns are mounting that the artificial intelligence spending boom is becoming increasingly difficult to justify.

At 10:26 a.m. New York time, the S&P 500 was down 0.5%, the Nasdaq 100 had fallen 1.2%, and the Dow Jones Industrial Average was largely flat. The weekly decline for major chipmakers is on track to be the worst since April of last year, with a key industry benchmark down 20% from its record high. A breakthrough by Chinese AI startup Moonshot AI has further dampened investor enthusiasm for the sector; simultaneously, capital is rotating away from highly-valued tech stocks towards more economically sensitive equities.

The chip sector had just recorded its best quarter ever, continuing an exceptionally strong rally fueled by robust AI demand. However, the group has recently faced volatility due to concerns over intensifying competition, potential overcapacity, and whether billions in AI investments will yield returns.

David Morrison of Trade Nation noted that, while earnings and demand trends remain strong, recent profit-taking suggests some investors are questioning how long the current growth pace can be sustained.

He added, "The question now is whether this becomes another 'buy the dip' opportunity, or whether the selling accelerates as everyone heads for the exit at the same time."