But now, officials believe the time has come to tiptoe away from such full-fledged support. Late last year, policymakers laid out a lower bar for slowing purchases than for lifting interest rates.

但现在，官员们认为，是时候悄然放弃这种全面的支持了。去年晚些时候，政策制定者为放缓购买设定了比加息更低的门槛。