Wall Street has enjoyed a second straight year of feverish revenue growth. As 2022 approaches, however, big banks face a major challenge in maintaining that torrid pace of business.

A white-hot market for deals, coupled with strong capital markets and steady demand for financial services from wealthy clients, have led to record results at large banks. At Goldman Sachs Group Inc., revenue reached $46.7 billion this year through Sept. 30 and Morgan Stanley booked $45.2 billion, both record highs. The final quarter of the year...

Wall Street has enjoyed a second straight year of feverish revenue growth. As 2022 approaches, however, big banks face a major challenge in maintaining that torrid pace of business.

A white-hot market for deals, coupled with strong capital markets and steady demand for financial services from wealthy clients, have led to record results at large banks. At Goldman Sachs Group Inc., revenue reached $46.7 billion this year through Sept. 30 and Morgan Stanley booked $45.2 billion, both record highs. The final quarter of the year is expected to be strong for banks’ revenue as well.

Bank stock prices have followed suit, handily beating a broader market that has itself enjoyed multiple records. The Nasdaq Bank Index is up about 32% for the year, beating the S&P 500’s 22% rally. Stocks sold off Monday over worries about the Omicron variant, but Goldman is still up 41% for the year and Morgan Stanley is up 39%.

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Yet analysts are unconvinced that the banks’ heady pace of deal making can continue. Goldman and Morgan Stanley have minted big trading revenues during the wild pandemic markets, but analysts are still trying to figure out what the new normal in trading looks like.

Analysts project Goldman will generate $48 billion in revenue next year, still strong by historical standards but down 18% from the 2021 full-year projection. They also expect Goldman’s 2022 per-share earnings to fall by about a third.

Analysts expect a far milder decline at Morgan Stanley, but they still expect leaner results in 2022, according to FactSet.

Bank executives have recently highlighted risks to their business. On a conference call in October, Goldman CEO David Solomon identified several key factors that could slow future economic growth, including inflation and Covid-19 variants.

Since then, inflation has reached a nearly four-decade high. The rise of the Omicron variant has led to another surge in Covid-19 cases. Morgan Stanley CEO James Gorman predicted in a CNBC interview last week that the virus will be a factor for most of next year. JPMorgan Chase & Co. said last week that its signature healthcare conference, long a hotbed of deal-making activity, would move online because of Covid concerns.

As the Federal Reserve and other central banks around the world deal with rising inflation amid the economic recovery from the pandemic, Turkey -- where the rate is currently over 20% -- offers a warning. Soaring inflation has led to economic turmoil after years of broad growth. Photo: Sedat Suna/Shutterstock The Wall Street Journal Interactive Edition

But some analysts are optimistic that even if business slows, bank stock prices won’t necessarily follow suit. “It’s not a stretch to say Morgan Stanley is an above-average growth story,” said Keith Horowitz, an analyst at Citigroup. He rates the shares as a buy after upgrading them earlier this month, with a new share price target of $115 over the next 12 months. (Morgan Stanley closed Monday at $95.37.)

He expects that half of Morgan Stanley’s revenue will come from wealth management in 2023, up from 40% today. Earnings from that business are more predictable than from investment banking or trading and deserve a higher earnings multiple, he said.

Goldman also has an opportunity to beef up its own wealth management and consumer finance offerings, which together accounted for just 12% of revenue so far this year. Mr. Horowitz rates Goldman shares as a buy with a price target of $480. (Goldman closed Monday at $371.61.)

Also, higher interest rates could lead to more volatile capital markets next year, which would likely boost the banks’ trading revenues.

“We think that the bank stocks are the right place to be,” Mr. Horowitz said.

Write to Charley Grant at charles.grant@wsj.com