think of a plan vanilla whole-life policy - you pay premiums every year, and when you die, the beneficiaries gets a fixed benefit.
Essentially, these policies have a built in rate of return. Let’s say I expect to die in 50 years, pay an annual premium of $500, and my wife gets $1,000,000 on my death, then:
PMT = 500
T = 50
FV = 1,000,0000
i can solve for rate of return:
so Rate = 11.5%
If interest rates start rising, i’m locked into a crappy 11.5% on my policy. Since these whole life policies are generally long term products, they typically carry a cash surrender value to protect me from this - all that means is i can forfeit the future death benefit for some value today (the “cash surrender value”).
THis is why rising interest rates can really mess up a life insurance company because (1) I will have a huge fixed income portfolio, and rising interest rates will reduce my asset values therefore eroding my surplus (equity) and (2) holders of the life policy will start to surrender the policy and demand cash immediately. THis puts a significant drain on my liquidity. To meet this increased demand for cash, i may have to start selling off fixed income securities at a loss.