"[T]hese plans' year to year volatility is closely tied to the performance of the supporting investment portfolio. An ideal investment strategy needs ... [to address] two key overarching objectives: [1] Improve the funded status of the plan while managing the ups and downs of the funded status volatility; and [2] Avoid having the plan become underfunded to the point where the plan falls into a 'death spiral'[.]"  MORE >>