US stocks are unlikely to sustain their above-average performance of the past decade as investors turn to other assets including bonds for better returns, Goldman Sachs Group Inc. strategists said.

The S&P 500 Index is expected to post an annualized nominal total return of just 3% over the next 10 years, according to an analysis by strategists including David Kostin. That compares with 13% in the last decade, and a long-term average of 11%.

They also see a roughly 72% chance that the benchmark index will trail Treasury bonds, and a 33% likelihood they’ll lag inflation through 2034.

“Investors should be prepared for equity returns during the next decade that are toward the lower end of their typical performance distribution,” the team wrote in a note dated Oct. 18.

US equities have have rallied following the global financial crisis, first driven by near-zero interest rates and later by bets on resilient economic growth. The S&P 500 is on track to outperform the rest of the world in eight of the last 10 years, according to data compiled by Bloomberg.

Still, this year’s 23% bounce has been concentrated in a handful of the biggest technology stocks. The Goldman strategists said they expect returns to broaden out and the equal-weighted S&P 500 to outperform the market cap-weighted benchmark in the next decade.

Even if the rally were to remain concentrated, the S&P 500 would post below-average returns of about 7%, they said.