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In North America, banks handle only 12 percent of their tasks on the cloud, but that could double in the next two years, the consulting firm Accenture said in a survey. Jamie Dimon, chief executive of JPMorgan Chase, said the bank needed to adopt new technologies such as artificial intelligence and cloud technology as fast as possible.

Jan. 4, 2022, 7:23 a.m. ET

Wells Fargo plans to move to data centers owned by Microsoft and Google over several years; Morgan Stanley is also working with Microsoft. Bank of America has saved $2 billion a year in part by building its own cloud. Goldman said in November that it would team up with Amazon Web Services to give clients access to mountains of financial data and analytical tools.

Cloud services enable banks to rent data storage and processing power from providers including Amazon, Google or Microsoft, which have their own data centers dotted around the globe. After moving to the cloud, banks can access their data on the internet and use the tech companies computing capacity when needed, instead of running their own servers year-round.

Seeing a big opportunity to sell cloud-computing services to Wall Street, some tech giants have hired former bankers who can use their knowledge of the rules and constraints under which banks operate to pitch the industry.

Scott Mullins, AWSs head of business development for financial services, previously worked at JPMorgan and Nasdaq. Yolande Piazza, vice president for financial services at Google Cloud, is the former chief executive of Citi FinTech, an innovation unit at Citigroup. Bill Borden at Microsoft and Howard Boville at IBM are Bank of America alumni.

Cloud providers are moving at a much faster development pace when you think of security, compliance and control structures, compared with individual banks, said Mr. Borden, a corporate vice president for worldwide financial services at Microsoft. The cloud, Mr. Borden and the other executives said, enables companies to increase their computer processing capabilities when they need it, which is much cheaper than running servers on their own premises.

But glitches do occur. One week after Goldman teamed up with Amazon, an AWS outage halted webcasts from a conference hosted by the bank that convened chief executives from the biggest U.S. financial firms. The glitch also caused problems for Amazons Alexa voice assistant, Disneys streaming service and Ticketmaster. AWS and its competitor, Microsoft Azure, both had outages recently.

Banking regulators in the United States, including the Federal Reserve, Federal Deposit Insurance Corporation and Office of the Comptroller of the Currency, have jointly underscored the need for lenders to manage risks and have backup systems in place when they outsource technology to cloud providers. The European Banking Authority warned firms about concentration risk, or becoming overly reliant on a single tech company.

The Financial Industry Regulatory Authority, which oversees broker dealers firms that engage in trading activity has already moved all its technology to the cloud. The group previously spent tens of millions of dollars a year to run its own servers but now rents space on AWS servers for a fraction of that amount, said Steven J. Randich, FINRAs chief information officer.

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Why Banks Are Slow to Embrace Cloud Computing - The New York Times