Agency wants to know whether money funds would survive a trading freeze.

Agency wants to know whether money funds would survive a trading freeze.

Combined effect of increasing regulation and rising interest rates may make borrowing more difficult for below-investment-grade companies.

Combined effect of increasing regulation and rising interest rates may make borrowing more difficult for below-investment-grade companies.

Big setback in energy sector is driving junk bonds down by as much as 19 percent.

Big setback in energy sector is driving junk bonds down by as much as 19 percent.

Low yields in bond markets increase pressure on investors to find the best deal, so many are turning to electronic trading.

Low yields in bond markets increase pressure on investors to find the best deal, so many are turning to electronic trading.