UBS: S&P 500 P/E Ratio Down 17%, Fed's Path Determines Future Market Outlook

According to Chaoxiang Research, in a research report dated September 28, 2026, UBS noted that the S&P 500's forward P/E ratio has declined 17% from its November high last year, while the 10-year US Treasury yield has increased by approximately 100 basis points year-to-date to 5.2%, placing it roughly 80 basis points above its one-year moving average. Over the past four decades, the 10-year US Treasury yield has exceeded 1.5 standard deviations only seven times. Current market pricing implies that the Federal Reserve will implement rate hikes totaling approximately 88 basis points over the next year, falling just short of the 100-basis-point threshold. UBS maintains that the Fed's path of rate hikes will determine the direction of equity markets. Historical precedent indicates that when rate hikes surpass 100 basis points within a year, the S&P 500 yields negative returns after twelve months; conversely, following moderate rate hikes, the index averages a 17.7% gain over the same period. Current pricing more closely mirrors a moderate tightening scenario. The valuation model suggests an implied upside potential of roughly 21% for the S&P 500. In terms of asset allocation, investors are advised to focus on high-growth, low-valuation sectors, including semiconductors, pharmaceuticals, refining, and diversified banks.