Are US stock markets over valued?

As Wall Street’s S&P500 reached record highs on Wednesday, largely based on hopes of interest rate cuts down the line and the AI boom, and after soaring past the historic 5,000 milestone in late February, market analysts are finding themselves at a crossroads of optimism and caution.

Some sell-side houses have reacted swiftly, adjusting their year-end forecasts in response to the bullish momentum.

Goldman Sachs, for instance, revised its projection upward to 5,200 by December 31st, a bold move considering the index was already hovering around 5,118 at the time.

However, amid the excitement, dissenting voices are emerging, warning of a potential bubble forming in the US stock market, particularly led by the tech sector.

Indeed, there’s no denying that US stocks are currently trading at lofty valuations when compared to historical norms and international counterparts.

The trailing price/earnings ratio on the S&P500 stands at approximately 27 times, signalling that it would take 27 years for the average S&P 500 company’s most recent earnings to equal its current market capitalization.

In stark contrast, the same ratio for the FTSE 100 sits at a modest 11 times, the German DAX at 15 times, and Asian indices such as the Nikkei 225 and Hang Seng at 16 times and 9 times, respectively.

However, the US economy has undeniably outshone its G7 counterparts since the onset of the Covid-19 pandemic.

Bolstered by robust economic performance, Big Tech companies have delivered impressive fourth-quarter earnings growth, validating investor confidence in the sector.

In essence, while US stocks may be trading at a premium, the justification lies in the exceptional resilience and growth potential of the American economy.

Yet, a lurking concern for Wall Street isn’t solely the valuations of tech giants, but rather the significant concentration of these companies within the S&P500 index.

Accounting for roughly a third of the index’s total market capitalization (if Amazon is included), the dominance of Big Tech poses a potential risk of instability for the broader market.

As I’ve previously highlighted, such elevated levels of sector concentration can exacerbate market volatility and pose challenges for index stability.

Looking ahead, the likelihood of a Wall Street bubble bursting seems less probable than a period of catch-up for European and Asian stock markets.

This anticipated shift comes as central banks signal intentions to cut rates and usher in a new economic cycle.

This momentum will likely be fuelled, in part, by the substantial weight of economically-cyclical stocks prevalent in major European indices compared to the S&P500.

Among these indices, the FTSE 100 stands out as particularly enticing, offering exposure to a diverse array of multinational corporations trading at relatively low valuations.

With only a fraction of their combined revenues originating within the UK, the FTSE 100 reflects a truly global index, poised to benefit from the resurgence of international markets.

In essence, while concerns persist regarding the valuation levels and sector concentration within the US stock market, the broader global landscape presents compelling opportunities for investors.

By exercising caution and diversifying their portfolios to include exposure to undervalued European and Asian markets, investors can navigate the complexities of today’s buoyant market environment with confidence and resilience.

Nigel Green is deVere CEO and Founder

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Also published on Medium.