New Trend Emerges in Global Financial Markets: "Worrisome"

A new trend appears to be emerging in global financial markets at present. That trend is “worrisome”, or anxiety.

Economists at the European Central Bank (ECB) have warned that extremely high stock valuations are likely to undergo a correction. This comes as US and European equities record all-time highs while investors continue to chase the artificial intelligence (AI) boom.

“Economic research on past technological revolutions leads to a worrying conclusion,” the economists wrote in a blog published on Monday, referring to two possible scenarios, as cited by CNBC International on Wednesday (19/8/2026).

“A correction to current stock market valuations is likely to occur.”

Overconfident and optimistic investors have pushed share prices far above their fundamental values. When that euphoria fades, they noted in the report, it could trigger a market crash.

The ECB economists compared the current situation with the railway industry boom of the 19th century, the expansion of electricity and radio in the 1920s, and the rise of the internet in the 1990s. This is not the first time the current AI wave has been likened to the dot-com bubble of the early 2000s.

“As adoption spreads… uncertainty becomes economy-wide in scale,” they added.

“If something then goes wrong with the technology, the entire economy will be affected,” the economists wrote, stressing that any technology-related transition will spill over into the broader economy.

This situation is prompting investors to demand a higher risk premium. According to the ECB’s analysis, this could ultimately weigh on share prices, even if corporate earnings growth remains strong.

“Both views point to a period of boom followed by a correction, or a decline from the valuation levels that have been reached, at some point in the future,” they said.

These Investors Are Highly Exposed

The ECB economists then warned of the potential impact of such a correction. They urged investors to prepare themselves.

European retail investors are said to be highly exposed, possibly without even realising it, because of the large weighting of “Magnificent 7” stocks in various global index funds and pension funds. The Magnificent 7 refers to seven giant US technology companies that carry significant weight in the stock market, namely Alphabet, Amazon, Apple, Meta, Microsoft, Nvidia, and Tesla.

Another risk is that a sharp correction could trigger a domino effect through fund-based investment structures. This could ultimately threaten the stability of the euro area, the economists continued.

“Unlike the dot-com period, current initial conditions leave far less room to cut interest rates or use fiscal policy to cushion the impact,” they wrote.