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S&P 500 Forecast: This Fundamental Metric Is Screaming “Buy”

S&P 500 Forecast: This Fundamental Metric Is Screaming “Buy”

By
Jack Bowman
Published: Mar 26, 2026, 17:10 GMT+00:00

What if the market isn’t actually expensive, but rather underestimated? As multiples tighten and sentiment becomes more cautious, an important underlying measure is showing signs of improvement: profits are rising even as prices fall. If past patterns prevail, then this gap could signal one of the most attractive entry points for the S&P 500 in recent years.

In the past, I’ve called this the “chart that beats the valuation bears,” and I really believe that. Under the hood of modern markets, a shift has been going on for over two decades. Average valuations, like forward price-to-earnings ratios, have been steadily rising. But what if that can be explained and justified? What if valuations just should be higher? I argue that profitability, specifically forward profit margins, trumps earnings premiums and justifies structurally higher P/E ratios over time. Cutting to the chase, here’s the chart showing how deep the correlation has been over the last two decades: