Listen to This ArticleThe Federal Reserve’s hotly anticipated March 22 interest rate decision is just a week and a half away, and the drama that swept the banking and financial sector over the weekend is drastically shaking up expectations for what the central bank will deliver.The Fed had been raising interest rates rapidly to try to contain the most painful burst of inflation since the 1980s, lifting them to above 4.5 percent from near zero a year ago. Concern about rapid inflation prompted the central bank to make four consecutive 0.75-point increases last year before slowing to a half point in December and a quarter point in February.Before this weekend, investors believed there was a substantial chance that the Fed would make a half-point increase at its meeting next week. That step up was seen as an option because job growth and consumer spending have proved surprisingly resilient to higher rates — prompting Jerome H. Powell, the Fed chair, to signal just last week that the Fed would consider a bigger move.But investors and economists no longer see that as a likely possibility.Three notable banks have failed in the past week alone as Fed interest rate increases ricochet through the technology sector and cryptocurrency markets and upend even usually staid bank business models.Regulators unveiled a sweeping intervention on Sunday evening to try to prevent panic from coursing across the broader financial system, with the Treasury, Federal Deposit Insurance Corporation and Fed saying depositors at the failed banks will be paid back in full. The Fed announced an emergency lending program to help funnel cash to banks facing steep losses on their holdings because of the change in interest rates.The Downfall of Silicon Valley BankOne of the most prominent lenders in the world of technology start-ups collapsed on March 10, forcing the U.S. government to step in.A Rapid Fall: The collapse of Silicon Valley Bank, the biggest U.S. bank failure since the 2008 financial crisis, was caused by a run on the bank. But will the turmoil prove to be fleeting — or turn into a true crisis?The Fallout: The bank’s implosion rattled a start-up industry already on edge, and some of the worst casualties of the collapse were companies developing solutions for the climate crisis.Signature Bank: The New York financial institution closed its doors abruptly after regulators said it could threaten the entire financial system. To some extent, it is a victim of the panic around Silicon Valley Bank.The Fed’s Next Move: The Federal Reserve has been rapidly raising interest rates to fight inflation, but making big moves could be trickier after Silicon Valley Bank’s blowup.The tumult — and the risks that it exposed — could make the central bank more cautious as it pushes forward.Investors have abruptly downgraded how many interest rate moves they expect this year. After Mr. Powell’s speech last week opened the door to a large rate change at the next meeting, investors had sharply marked up their 2023 forecasts, even penciling in a tiny chance that rates would rise above 6 percent this year. But after the wild weekend in finance, they see just a small move this month and expect the Fed to cut rates to just above 4.25 percent by the end of the year.Economists at J.P. Morgan said the situation bolstered the case for a smaller, quarter-point move this month.“I don’t hold that view with tons of confidence,” said Michael Feroli, chief U.S. economist at J.P. Morgan, explaining that a move this month was conditional on the banking system’s functioning smoothly. “We’ll see if these backstops have been enough to quell concerns. If they are successful, I think the Fed wants to continue on the path to tightening policy.”Goldman Sachs economists no longer expect a rate move at all. While Goldman analysts still think the Fed will raise rates to above 5.25 percent this year, they wrote on Sunday evening that they “see considerable uncertainty” about the path.“I think the Fed is going to want to wait awhile to see how this plays out,” said William English, a former director of the monetary affairs division at the Fed who is now at Yale. He explained that tremors in the banking system could spook lenders, consumers and businesses — slowing the economy and meaning that the Fed had to do less to cool the economy and lower inflation.“If it were me, I’d be inclined to pause,” Mr. English said.Other economists went even further: Nomura, saying it was unclear whether the government’s relief program was enough to stop problems in the banking sector, is now calling for a quarter-point rate cut at the coming meeting.The Fed will receive fresh information on inflation on Tuesday, when the Consumer Price Index is released. That measure is likely to have climbed 6 percent over the year through February, economists in a Bloomberg forecast expected. That would be down slightly from 6.4 percent in a previous reading.But economists expected prices to climb 0.4 percent from January after food and fuel prices, which jump around a lot, are stripped out. That pace would be quick enough to suggest that inflation pressures were still unusually stubborn — which would typically argue for a forceful Fed response.The data could underline why this moment poses a major challenge for the Fed. The central bank is in charge of fostering stable inflation, which is why it has been raising interest rates to slow spending and business expansions, hoping to rein in growth and cool price increases.But it also charged with maintaining financial system stability, and higher interest rates can reveal weaknesses in the financial system — as the blowup of Silicon Valley Bank on Friday and the towering risks for the rest of the banking sector illustrated. That means those goals can come into conflict.Subadra Rajappa, head of U.S. rates strategy at Société Générale, said on Sunday afternoon that she thought the unfolding banking situation would be a caution against moving rates quickly and drastically — and she said instability in banking would make the Fed’s task “trickier,” forcing it to balance the two jobs.“On the one hand, they are going to have to raise rates: That’s the only tool they have at their disposal” to control inflation, she said. On the other, “it’s going to expose the frailty of the system.”Ms. Rajappa likened it to the old saying about the beach at low tide: “You’re going to see, when the tide runs out, who has been swimming naked.”Some saw the Fed’s new lending program — which will allow banks that are suffering in the high-rate environment to temporarily move to the Fed a chunk of the risk they are facing from higher interest rates — as a sort of insurance policy that could allow the central bank to continue raising rates without causing further ruptures.“The Fed has basically just written insurance on interest-rate risk for the whole banking system,” said Steven Kelly, senior research associate at Yale’s program on financial stability. “They’ve basically underwritten the banking system, and that gives them more room to tighten monetary policy.”Joe Rennison More