But these present some of the same problems as long-term bonds.
Some long-term bonds rose by a third of a point.
And over the next four years, the city has plans to issue $17.8 billion more in long-term bonds.
But Congress could also give the bank board more authority to issue long-term bonds.
At the same time, no new money is expected to go into long-term bonds, he added.
At the time, long-term bonds were paying more than 6 percent.
"I wouldn't leave it in long-term bonds, because interest rates probably are going to go up some more."
If that is so, then this would seem to be a time to avoid all long-term bonds.
These centers also offer children a chance to form long-term bonds with teachers.
As such, this would not add to the supply of long-term bonds, he said.