The ultimate rate change derived from pricing is given by ELR/PLR - 1. If PLR is given, which expression yields the required rate change?

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Multiple Choice

The ultimate rate change derived from pricing is given by ELR/PLR - 1. If PLR is given, which expression yields the required rate change?

Explanation:
When pricing, the rate change is expressed as the relative change of the expected loss ratio over the baseline premium loss ratio. That means the rate change equals ELR/PLR minus 1. Algebraically, ELR/PLR − 1 is the same as (ELR − PLR)/PLR, so you could rewrite it in that form and get the same result. The standard way to present the rate change is ELR/PLR − 1. For example, if ELR is 0.15 and PLR is 0.10, the rate change is 0.15/0.10 − 1 = 0.5, i.e., a 50% increase.

When pricing, the rate change is expressed as the relative change of the expected loss ratio over the baseline premium loss ratio. That means the rate change equals ELR/PLR minus 1. Algebraically, ELR/PLR − 1 is the same as (ELR − PLR)/PLR, so you could rewrite it in that form and get the same result. The standard way to present the rate change is ELR/PLR − 1. For example, if ELR is 0.15 and PLR is 0.10, the rate change is 0.15/0.10 − 1 = 0.5, i.e., a 50% increase.

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