The document discusses the declared dividend interest rates (DIRs) for participating whole life insurance policies from major insurers in 2015, providing key figures for Guardian, MassMutual, New York Life, and Northwestern Mutual. It analyzes the factors influencing changes in DIRs, emphasizing the correlation between DIRs and long-term interest rates, particularly those related to investment-grade bonds and mortgages, as well as variation in asset allocations among insurers. The document further explores the implications of interest rate movements on DIR sustainability and the performance of participating whole life policies.