Wall Street futures fall as AI fears spark global tech sell-off

US stock market futures fell sharply on Tuesday, showing that Wall Street could open lower. The biggest fall was seen in technology stocks, as investors started worrying about whether the artificial intelligence (AI) boom is moving too fast.

Nasdaq 100 futures dropped by 2.5 percent, S&P 500 futures fell by 1.3 percent, and Dow Jones futures were down by around 0.6 percent. This sudden fall has raised concerns across global markets.

The main reason behind this drop is fear that AI companies may not make enough profits to match the huge money investors have put into them.

For months, AI has been one of the biggest reasons behind the strong rise in stock markets around the world. Big companies linked to AI, such as chipmakers and software firms, saw their share prices rise rapidly. But now, investors are becoming more careful.

Many are asking an important question: Are these companies really worth such high prices?

This question has triggered a large sell-off in technology stocks.

The weakness started on Monday when the Nasdaq Composite fell by 1.3 percent. The S&P 500 also ended lower as investors sold shares of major tech companies.

Experts say this is a sign that confidence in the AI sector is becoming weaker.

South Korea adds to market fears

The fear became even bigger after a major crash in South Korea’s stock market.

The Kospi Index dropped by 10 percent, forcing trading to stop for some time because of heavy selling. This shocked investors around the world.

The biggest losses came from South Korean chipmakers.

SK Hynix and Samsung Electronics both saw their shares fall by more than 12 percent.

The reason was reports suggesting that SK Hynix may slow down its AI memory chip production. Instead, the company may focus more on traditional DRAM chips.

This news created panic in the market.

AI chips have become a major part of the global technology boom. If demand for these chips slows down, it could affect many other companies linked to AI.

As a result, technology stocks across Asia also fell sharply.

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The Asian technology stock index dropped by almost 5 percent. This ended its eight-day winning streak.

For many investors, this was a warning sign.

AI-related stocks had been rising for months without much stopping. But this sudden fall showed how quickly things can change.

Another reason for worry is how much these stocks had already gone up.

For example, SK Hynix had gained nearly 350 percent in 2026 before Tuesday’s sharp drop.

Such huge gains often make markets risky because prices can become too high compared to actual earnings.

Experts say this is called “overvaluation.”

When investors feel a stock is overpriced, they start selling quickly, causing prices to fall even faster.

Investors now wait for key earnings

The next big focus for the market is Micron Technology.

The company is expected to release its quarterly earnings later this week. Investors are closely watching because Micron is one of the key players in AI memory chips.

Its results could give a clear idea about how strong AI demand really is.

Investors especially want to know if data centers are still spending heavily on AI infrastructure.

If Micron gives strong numbers, it may help calm markets.

But if results disappoint, the tech sell-off could become even worse.

Apart from AI worries, there are also concerns about inflation and the US Federal Reserve.

Investors are still watching whether the Fed will cut interest rates later this year.

Higher interest rates usually hurt technology stocks because these companies depend heavily on future growth.

This has made traders even more nervous.

The sell-off was not limited to Asia.

European markets also opened lower.

The Stoxx Europe 600 Index fell nearly 1 percent as investors reduced their risk.

This shows that fear is spreading globally.

Market experts call this a “risk-off” mood. It means investors move money out of risky assets like growth stocks and shift towards safer investments.

Interestingly, positive political news did little to help.

The United States recently gave Iran a 60-day waiver to continue oil exports, which reduced worries about oil supply.

This caused oil prices to fall, with Brent crude dropping below $77 per barrel.

Normally, lower oil prices can help markets by reducing inflation pressure.

But this time, investors were more focused on technology stocks.

The AI boom has been one of the strongest market stories of 2026.

It helped push many global stock markets to record highs.

But now, some investors believe the excitement may have gone too far.

The big concern is simple: AI companies need to start showing real profits.

If they fail to do that, stock prices may continue to fall.

For now, Wall Street futures suggest another weak day ahead.

The coming days will be important, especially with Micron’s earnings and more economic data on the way.

Markets will be watching closely to see whether this is just a short correction or the beginning of a bigger slowdown in the AI-driven rally.