The European Central Bank is finding that the pool of bonds it can purchase under its quantitative-easing program is shrinking.
Under current rules, the Frankfurt-based bank can only buy bonds yielding more than its minus 0.2 percent deposit rate. A recent rally in euro-zone debt markets has pushed the total value of ineligible securities to $924 billion, from $750 billion on Oct. 22 when the ECB last had a policy meeting.