NEW YORK >> The U.S. government took extraordinary steps today to stop a potential banking crisis after the historic failure of Silicon Valley Bank, assuring all depositors at the failed institution that they could access all their money quickly, even as another major bank was shut down.

The announcement came amid fears that the factors that caused the Santa Clara, California-based bank to fail could spread. Regulators had worked all weekend to try to find a buyer for the bank, which was the second-largest bank failure in history. Those efforts appeared to have failed today.

In a sign of how fast the financial bleeding was occurring, regulators announced that New York-based Signature Bank had also failed and was being seized today. At more than $110 billion in assets, Signature Bank is the third-largest bank failure in U.S. history.

The near-financial crisis that U.S. regulators had to intervene to prevent left Asian markets jittery as trading began Monday. Japan’s benchmark Nikkei 225 sank 1.6% in morning trading, Australia’s S&P/ASX 200 lost 0.3% and South Korea’s Kospi shed 0.4%. But Hong Kong’s Hang Seng rose 1.4% and the Shanghai Composite increased 0.3%.

To shore up confidence in the banking system, the Treasury Department, Federal Reserve and FDIC said today that all Silicon Valley Bank clients would be protected and able to access their money. They also announced steps that are intended to protect the bank’s customers and prevent additional bank runs.

“This step will ensure that the U.S. banking system continues to perform its vital roles of protecting deposits and providing access to credit to households and businesses in a manner that promotes strong and sustainable economic growth,” the agencies said in a joint statement.

Under the plan, depositors at Silicon Valley Bank and Signature Bank, including those whose holdings exceed the $250,000 insurance limit, will be able to access their money on Monday.

In a separate move, the Federal Reserve late today announced an expansive emergency lending program that’s intended to prevent a wave of bank runs that would threaten the stability of the banking system and the economy as a whole.

Fed officials characterized the program as akin to what central banks have done for many decades: Lend freely to the banking system so that customers would be confident that they could access their accounts whenever needed.

The lending facility will allow banks that need to raise cash to pay depositors to borrow that money from the Fed, rather than having to sell Treasuries and other securities to raise the money. Silicon Valley Bank had been forced to dump some of its Treasuries at at a loss to fund its customers’ withdrawals. Under the Fed’s new program, banks can post those securities as collateral and borrow from the emergency facility.

The Treasury has set aside $25 billion to offset any losses incurred under the Fed’s emergency lending facility. Fed officials said, however, that they do not expect to have to use any of that money, given that the securities posted as collateral have a very low risk of default.

Analysts said the Fed’s program should be enough to calm financial markets on Monday.

“Monday will surely be a stressful day for many in the regional banking sector, but today’s action dramatically reduces the risk of further contagion,” economists at Jefferies, an investment bank, said in a research note.

Though today’s steps marked the most extensive government intervention in the banking system since the 2008 financial crisis, its actions are relatively limited compared with what was done 15 years ago. The two failed banks themselves have not been rescued, and taxpayer money has not been provided to the banks.

President Joe Biden said this evening as he boarded Air Force One back to Washington that he would speak about the bank situation on Monday. In a statement, Biden also said he was “firmly committed to holding those responsible for this mess fully accountable and to continuing our efforts to strengthen oversight and regulation of larger banks so that we are not in this position again.”

Regulators had to rush to close Silicon Valley Bank, a financial institution with more than $200 billion in assets, on Friday when it experienced a traditional run on the bank where depositors rushed to withdraw their funds all at once. It is the second-largest bank failure in U.S. history, behind only the 2008 failure of Washington Mutual.

Some prominent Silicon Valley executives feared that if Washington didn’t rescue the failed bank, customers would make runs on other financial institutions in the coming days. Stock prices plunged over the last few days at other banks that cater to technology companies, including First Republic Bank and PacWest Bank.

Among the bank’s customers are a range of companies from California’s wine industry, where many wineries rely on Silicon Valley Bank for loans, and technology startups devoted to combating climate change. Sunrun, which sells and leases solar energy systems, had less than $80 million of cash deposits with Silicon Valley. Stitchfix, the popular clothing retail website, disclosed in a recent quarterly report that it had a credit line of up to $100 million with Silicon Valley Bank and other lenders.

Tiffany Dufu, founder and CEO of The Cru, a New York-based career coaching platform and community for women, posted a video today on LinkedIn from an airport bathroom, saying the bank crisis was testing her resiliency. Given that her money was tied up at Silicon Valley Bank, she had to pay her employees out of her personal bank account. With two teenagers to support who will be heading to college, she said she was relieved to hear that the government’s intent is to make depositors whole.

“Small businesses and early-stage startups don’t have a lot of access to leverage in a situation like this, and we’re often in a very vulnerable position, particularly when we have to fight so hard to get the wires into your bank account to begin with, particularly for me, as a Black female founder,” Dufu told The Associated Press.

Silicon Valley Bank began its slide into insolvency when its customers, largely technology companies that needed cash as they struggled to get financing, started withdrawing their deposits. The bank had to sell bonds at a loss to cover the withdrawals, leading to the largest failure of a U.S. financial institution since the height of the financial crisis.

Yellen described rising interest rates, which have been increased by the Federal Reserve to combat inflation, as the core problem for Silicon Valley Bank. Many of its assets, such as bonds or mortgage-backed securities, lost market value as rates climbed.

Sheila Bair, who was chairwoman of the FDIC chair during the 2008 financial crisis, recalled that with almost all the bank failures during that time, “we sold a failed bank to a healthy bank. And usually, the healthy acquirer would also cover the uninsured because they wanted the franchise value of those large depositors so optimally, that’s the best outcome.”

But with Silicon Valley Bank, she told NBC’s “Meet the Press,” “this was a liquidity failure, it was a bank run, so they didn’t have time to prepare to market the bank. So they’re having to do that now, and playing catch-up.”