Barclays, which over the weekend balked at acquiring stricken Lehman Brothers Holdings, agreed to pay about $1.75 billion (£1 billion sterling) for some of the bank's prime US assets following its bankruptcy filing.
Most of the price tag was accounted for by Lehman's New York headquarters and two data centers, while the British bank will pay just $250 million in cash for Lehman's North American investment banking and capital markets businesses.
The operations include fixed income and equities sales, trading and research, and investment banking, giving Barclays a major US investment banking presence and helping its president Bob Diamond realize his ambition to take on Wall Street investment banks on their own turf.
The deal, announced late last night, would unite two big debt trading houses and could staunch the flow of customers fleeing Lehman in the wake of the largest bankruptcy in US history.
It comes after days of intense upheaval on Wall Street, which also saw the US government agreeing late yesterday to rescue American International Group with an $85 billion loan from the Federal Reserve.
The Lehman operations to be acquired have about 10,000 employees, estimated trading assets of $72 billion (£40 billion), and $68 billion (£38 billion in liabilities.
The businesses will be merged into Barclays Capital, which is headed by Diamond, a former executive of Credit Suisse First Boston and Morgan Stanley. "This is a once in a lifetime opportunity for Barclays," Diamond said.
Barclays said some of its shareholders had expressed interest in increasing their stakes in the bank as part of their support for the deal, and its board expects those discussions to lead to a subscription of at least $1 billion of additional equity.
It will announce further details of the expected issue of new shares in due course, it said.
The deal needs to be approved by the US bankruptcy court in New York and can be terminated if it is not completed by September 24th. Lehman is filing an emergency motion to seek an approval. Not everyone was happy about the prospect, however.
Before the official announcement, one of Barclays' top 15 investors, who declined to be named, questioned the merit of pursuing Lehman in the current climate.
"Does Barclays not have better things to do with its capital? I don't think it's an environment for banking people to be brave," he said.
Barclays was involved in frantic talks over the weekend to rescue Lehman, but quit after US authorities would not guarantee the US investment bank's trading obligations.
That prompted Lehman's New York-based holding company to file for Chapter 11 bankruptcy protection, sending shockwaves through world financial markets as a year-long credit crunch claimed another, bigger victim.