debt yield

Money market securities are: (debt; equity; both debt and equity) securities.?
Money market securities are: (debt; equity; both debt and equity) securities. The interest rate (yield) on money market securities is: (greater than; less than; about the same) as capital market securities. Why?
I’m pretty sure money markets are short term debt, but for the interest rate, money markets interest rate (yield) would be LESS because there is a lot of conservatism, less risk involved. Just wanted to make sure this is correct
They are debt. Short term debt at that normally less than 30 days.
90 seconds at 9am: Greece thrown to the IMF; US bond yields rising