Jumping prices and the ghost of 2013’s market meltdown loom over the Fed.

Federal Reserve officials are gathering in Washington this week with monetary policy still set to emergency mode, even as the economy rebounds and inflation accelerates.

Economists expect the central bank’s postmeeting statement at 2 p.m. Wednesday to leave policy unchanged, but investors will keenly watch a subsequent news conference with the Fed chair, Jerome H. Powell, for any hints at when — and how — officials might begin to pull back their economic support.

That’s because Fed policymakers are debating their plans for future “tapering,” the widely used term for slowing down monthly purchases of government-backed debt. The bond purchases are meant to keep money chugging through the economy by encouraging lending and spending, and slowing them would be the first step in moving policy toward a more normal setting.

Big and often conflicting considerations loom over the taper debate. Inflation has picked up more sharply than many Fed officials expected. Those price pressures are expected to fade, but the risk that they will linger is a source of discomfort, ramping up the urgency to create some sort of exit plan. At the same time, the job market is far from healed, and the surging Delta coronavirus variant means that the pandemic remains a real risk. Policy missteps could prove costly.

Here are a few key things to know about the bond-buying, and key details that Wall Street will be watching:

• The Fed is buying $120 billion in government backed bonds each month — $80 billion in Treasury debt and $40 billion in mortgage-backed securities.

• Economists mostly expect the central bank to announce plans to slow those purchases this year, perhaps as soon as August, before actually dialing them back late this year or early next. That slowdown is what Wall Street refers to as a “taper.”

• There’s a hot debate among policymakers about how that taper should play out. Some officials think the Fed should slow mortgage debt buying first because the housing market is booming. Others have said mortgage security buying has little special effect on the housing market. They have hinted or said they would favor tapering both types of purchases at the same speed.

• The Fed is moving cautiously, and for a reason: Back in 2013, markets convulsed when investors realized that a similar bond-buying program after the financial crisis would slow soon. Mr. Powell and crew do not want to stage a rerun.

• Bond-buying is just one of the Fed’s policy tools, and is used to lower longer-term interest rates and to get money chugging around the economy. The Fed also sets a policy interest rate, the federal funds rate, to keep borrowing costs low. It has been near zero since March 2020.

• Central bankers have been clear that tapering off bond purchases is the first step toward moving policy away from an emergency setting. Increases in the funds rate remain off in the distant future.