Goldman Sachs is urging investors to moderate expectations after an unusually strong period for global equities, with the firm’s chief global equity strategist Peter Oppenheimer forecasting more modest returns over the coming year. The warning arrives as a broad global bond selloff pushes long-term yields higher, increasing the discount rate applied to stocks and raising financing costs across the economy.

Goldman Expects a Slower Pace of Equity Gains

Oppenheimer told Yahoo Finance that the S&P 500 and other major equity markets have already delivered what he described as phenomenal returns over the past year and year to date. Goldman now expects mid- to high-single-digit percentage returns in most regions during the next 12 months, assuming economic growth remains intact.

The distinction is important. Goldman is not forecasting an outright bear market or a collapse in asset prices. Rather, the bank is arguing that the exceptionally strong returns of the recent period should not be treated as a normal baseline. The S&P 500 had gained roughly 12% during 2026 at the time of the assessment, making a continuation of similarly rapid gains increasingly dependent on earnings growth, economic resilience and stable financial conditions.

Bond Yields Are Becoming a Constraint on Valuations

The more important signal may be coming from fixed income. The 10-year U.S. Treasury yield reached 4.814%, its highest level since November 2023, while the 30-year Treasury yield moved above 5.33% in August, reaching its highest level in roughly 19 years. Higher long-term yields matter because Treasuries serve as a benchmark for mortgages, corporate borrowing and the valuation of future cash flows from equities.

When government bonds offer higher yields, the relative attractiveness of riskier assets can change. Companies whose valuations depend heavily on profits expected many years into the future are particularly sensitive to changes in discount rates. The effect can be amplified when investors are already paying elevated multiples for growth stocks.

The pressure is not limited to the United States. Japan’s 10-year government bond yield recently reached 3% for the first time since 1996, while long-term borrowing costs have also risen sharply in the United Kingdom and Germany. The synchronized increase suggests that the bond-market adjustment is being driven by broader concerns over inflation, fiscal deficits, government debt and the supply of new bonds rather than by a single central-bank decision.

Fed Policy Adds Another Layer of Risk

U.S. monetary policy is adding to the uncertainty. The August employment report showed that American employers added 162,000 jobs, while unemployment remained at 4.1%. The stronger-than-expected labor-market data pushed Treasury yields higher and increased expectations that the Federal Reserve could maintain or tighten restrictive policy if inflation remains persistent.

Oil prices are another variable. Higher energy costs can feed into inflation expectations, potentially limiting the Federal Reserve’s ability to ease financial conditions. This creates a difficult combination for markets: stronger economic activity can support corporate earnings, but it can also keep interest rates higher for longer and therefore constrain equity valuations.

Why the Bond Market Matters Beyond Fixed Income

The implications extend well beyond bond portfolios. Rising Treasury yields increase borrowing costs for governments, corporations and households, while higher mortgage rates can weigh on housing activity and consumer spending. Recent global fund flows show that investors have responded cautiously, with money-market funds attracting substantial inflows as bond-market volatility increased.

For equity markets, the central question is whether earnings growth can outpace the valuation pressure created by higher yields. Companies with strong cash generation and resilient demand may be better positioned to absorb higher financing costs, while highly valued businesses dependent on distant future growth could face greater sensitivity to changes in interest rates.

Markets will now focus on upcoming U.S. inflation data and the Federal Reserve’s policy decision, while longer-term Treasury yields, oil prices and government borrowing plans remain critical indicators. Goldman’s outlook suggests that the next stage of the cycle may be defined less by broad multiple expansion and more by earnings quality, economic resilience and the cost of capital. If yields remain elevated, investors may have to adjust to a market environment in which positive returns remain possible but are less likely to come as easily as they did during the preceding rally.