Underwriting Risk, Investing, and Treatment of Risk

We turn now to the risks assumed by malpractice insurers when they underwrite policyholders’ liability and by investors who contribute capital to the insurance firm— classically, the stockholders in a for-profit firm. A distinction is often made on whether a risk is diversifiable or non-diversifiable. Diversifiable risks occur largely independently of one another, like successive flips of a coin. Thus, pooling individual risks reduces the risk. When enough risks are pooled, variation in outcome is diversified away and aggregate experience becomes highly predictable, like the percentage of heads in many tosses of a coin. (more…)




