10-year Treasury yield edges up to 0.68pc

Treasury yields also climbed Wednesday after the Federal Reserve minutes showed, among other things, that several Fed officials said trying to set upper limits for yields beyond ultrashort-term rates would provide only a modest help.

Some investors have been speculating that could be a step the Fed would take next to help the economy.

The yield on the 10-year Treasury edged up  to 0.68 percent from 0.67 percent late Tuesday. It had been as low as 0.64 percent earlier in the morning.