Investors will take a big hit from lower interest rates, Deutsche Bank says.

Investors will take a big hit from lower interest rates, Deutsche Bank says.

"Long-end exposed to a lot more risk," Pimco's El-Erian says

"Long-end exposed to a lot more risk," Pimco's El-Erian says

Spains rating lowered three notches, to Baa3, on growing debt burden.

Spains rating lowered three notches, to Baa3, on growing debt burden.

Ratings agency says second downgrade reflects nations debt burden.

Worst credit market sell-off since 2010 suggests long bull market may be ending.