Which of the following is FALSE regarding spread duration? A Spread duration is an alternative measure to duration times spread used to measure exposure to a change in credit spreads. B As long as the change in rates or spreads are in parallel shifts, the approximate duration and the approximate spread duration are the same for vanilla bonds. C Spread duration is the sensitivity of a bond, bond sector, or bond portfolio to a parallel shift in credit spreads. D Empirical evidence suggest that there is at times an direct correlation between the change in the level of Treasury yields and the change in credit spreads