The long bond's yield tumbled to 8.44 percent from 8.57 percent the day before and 8.66 percent a week ago.

During the week, the yield on the bond has tumbled to 8.41 percent from 8.65 percent.

The yield on the Treasury's long bond tumbled to 8.44 percent from 8.57 percent.

The yield on the bellwether 30-year Treasury tumbled to 8.14 percent.

The yield on the new long bonds tumbled to 8.63 percent, from the average of 8.84 percent produced at the auction the day before.

The yield tumbled to 8.14 percent from 8.29 percent the day before and 8.46 percent a week earlier.

By Friday, the yield had tumbled back below 6 percent, to 5.97 percent.

The yield on the benchmark 30-year bond tumbled to 6.62 percent from 6.71.

The yield on the 30-year bond tumbled to 8.76 percent, from 9.01 percent the day before and 9.14 percent a week earlier.

And when yields tumbled in the bond market yesterday, stock prices soared.