The S&P 500’s current valuation has raised concerns about a potential significant decline in stock prices, particularly as tariffs threaten to become a substantial economic headwind. Despite warnings from Federal Reserve Chair Jerome Powell about the high cost of stocks, the index has seen a modest increase of about 3% since his comments in September. This rise, while not substantial, suggests that the market has somewhat ignored these cautions.
Recent studies indicate that President Trump’s tariffs are likely to slow economic growth, contradicting his assertions that they benefit the U.S. economy. The tariffs have surged the average tax on U.S. imports to approximately 13%, nearing levels not seen in 90 years. While Trump maintains that the burden falls primarily on foreign producers, research reveals a different story.
According to findings from the National Bureau of Economic Research, a staggering 94% of these tariffs are ultimately borne by U.S. companies and consumers by 2025. Similarly, research from the Federal Reserve Bank of New York points out that U.S. entities shoulder 86% of the costs, with foreign exporters only taking on about 14%. Furthermore, research from the Kiel Institute highlights that nearly all tariff costs—96%—are passed down to American importers and consumers. The Congressional Budget Office (CBO) estimates show that only 5% of the tariffs will be absorbed by foreign exporters, further emphasizing the impact of these tariffs on domestic spending.
The immediate implication is clear: every dollar collected in tariffs reduces the purchasing power of U.S. consumers and businesses, ultimately hindering economic growth. The CBO has also indicated that these tariffs will result in a lower real GDP than if they had not been imposed, creating further cause for concern regarding future corporate earnings and, by extension, stock valuations, which are typically linked to earnings performance.
The current market climate heightens these risks, particularly given that the S&P 500 has maintained elevated valuations for months. Powell’s warning that equity prices are “fairly highly valued” resonates in light of the recent Federal Reserve Financial Stability Report, which highlighted the S&P 500’s forward price-to-earnings (PE) ratio nearing historical highs. By January, the S&P 500 had a forward PE multiple of 22.2, significantly above the 10-year average of 18.8. Historically, such elevated valuations have often preceded bear markets, including the dot-com bubble and the Covid-19 pandemic, leading to declines of 49% and 34%, respectively.
Forward PE ratios, derived from future earnings estimates, suggest that stocks are already overvalued. If analysts have overestimated these future earnings—an outcome made more likely due to tariff impacts—the market could face a sharp decline or even a crash.
Investors are cautioned against making drastic decisions in response to these developments. While there may be a temptation to liquidate entire portfolios, such actions could backfire, particularly if unforeseen factors, like productivity advancements from artificial intelligence, provide a counterbalance to tariff-induced economic slowdowns. Instead, a prudent approach would be to exercise caution, consider small investments, and avoid purchasing stocks that one would find uncomfortable to hold during a significant market downturn.
