S&P 500 Forecast to Deliver 3.1% Annual Returns as P/E Falls to 17
Rob Arnott forecasts that S&P 500 total returns will average just 3.1% annually over the next decade, driven by a contraction in the P/E multiple from 27.5 to roughly 17 and earnings growth of 5.3%. Dividend yield of 1.2% contributes but overall returns are projected to barely outpace inflation.
1. Dour Decade-Long Return Forecast
Rob Arnott’s model predicts total annual S&P 500 returns of 3.1% over the next decade, comprising 1.2% from dividends, 5.3% from EPS growth and a negative 3.4% drag from multiple contraction that would see the P/E ratio decline from 27.5 today to about 17 by 2036.
2. Divergent Growth and Value Prospects
The forecast anticipates a 4.0% annual return for value stocks versus 1.4% for growth, as stretched valuations of the Mag 7 and AI beneficiaries drive a steeper mean reversion in high-flying names.
3. Mean Reversion Rationale
Arnott warns that the exceptional profit and valuation expansion since 2016 cannot continue, citing historical norms where earnings growth aligns with economic trends and P/E multiples revert to long-term averages.