Comparing changes in spreads between corporate bonds and Treasury securities, which of the following is true? Changes in corporate credit spreads tend to move in the opposite direction of changes in treasury rates Changes in corporate credit spreads tend to move in the same direction of changes in treasury rates Changes in corporate credit spreads tend to move independently with changes in treasury rates Changes in corporate credit spreads tend to move with changes in treasury rates based on the square of the standard deviation of the change in treasury rates