Walter cites concerns about fairness, but says SEC wont impose an equity-market structure on bonds.

Measure plays role in instruments ranging from bonds to annuities.

Measure plays role in instruments ranging from bonds to annuities.

Agency is investigating possible price manipulation of benchmark interest-rate swaps.

Agency is investigating possible price manipulation of benchmark interest-rate swaps.

Interest-rate swap future contracts wouldn't be included in Dodd-Frank swap count.

Interest-rate swap future contracts wouldn't be included in Dodd-Frank swap count.

Units of JP Morgan Chase, Goldman Sachs and Barclays sign up.