Bonds are differently categories based on yield they generate. For example: high yield, investment grade, and junk grade. Now, what can be said about the correlations between different bond types?

		None of these are correct.
		low correlations between various investment grade bond indexes.
		high correlations between investment grade bonds and high yield bonds.
		no correlations between investment grade bonds and high yield bonds.
		low correlations between investment grade bonds and high yield bonds.