Voluntary Private Insurance Market

Study guides: Exam 6C, Exam 6U

The Voluntary Private Insurance Market is the part of the market in which privately owned insurers choose which risks to accept and at what price, within the limits of regulation, and buyers choose whether and from whom to buy. It is defined by contrast with residual markets, government insurers and compulsory social programs, where one side of the bargain is compelled.

\text{Residual share} = \frac{\text{Residual exposures}}{\text{Voluntary exposures} + \text{Residual exposures}}

• What makes it voluntary: freedom to underwrite (select, decline, set terms), risk-based pricing, competition, and private capital at risk. Regulation narrows each of these — rate approval, classification restrictions, the Take-All-Comers Rule in Ontario auto, compulsory purchase — and the tighter the constraints, the more business the voluntary market pushes elsewhere.
• Where it fails, programs step in: correlated catastrophe losses (flood, terrorism, crop), severe adverse selection, and prices held below cost for compulsory coverage.
• Five interactions with programs:
  • Residual — the program takes what the voluntary market declines (Facility Association, risk sharing pools and the PRR in Canada; automobile plans, FAIR plans and workers' compensation pools in the U.S.), and voluntary writers share its results by market share.
  • Private delivery — insurers sell and service program policies for a fee without bearing the risk (NFIP "Write Your Own" carriers, crop insurance providers, Facility Association servicing carriers).
  • Backstop — a government layer caps the tail so private cover remains available (TRIA, the Florida Hurricane Catastrophe Fund).
  • Complement — private insurance sits above a public floor (optional and excess auto above public basic cover, supplementary health above medicare).
  • Competition and crowd-out — a subsidised or monopoly program can displace private writers, while private writers can cherry-pick a program's over-priced risks and leave it adversely selected.
• Residual share is a diagnostic. A growing residual market signals that approved rates or permitted classifications no longer let the voluntary market write part of the risk spectrum. Depopulation — returning those risks to voluntary writers — follows rate adequacy, not exhortation.
• Every voluntary writer also funds the failures of its competitors through post-assessment guaranty funds such as PACICC.

The Cost of a Residual Auto Market A jurisdiction has 2{,}000{,}000 insured vehicles, 90{,}000 of them in the residual plan. The plan's annual deficit of \$36 million is shared by voluntary market share. An insurer with 12\% of the voluntary market writes \$300 million of voluntary premium. Find the residual share and the insurer's burden.

Answer

\begin{align*}
\text{Residual share} &= \frac{90{,}000}{2{,}000{,}000} \\
&= 4.5\% \\[4pt]
\text{Insurer's share} &= 0.12 \times \$36\text{M} \\
&= \$4.32\text{M} \\[4pt]
\text{As \% of premium} &= \frac{4.32}{300} \\
&= 1.44\%
\end{align*}

Voluntary policyholders pay about 1.4\% more to subsidise drivers the voluntary market would not write at approved rates. If rate suppression doubled the plan to 180{,}000 vehicles (9\%), the deficit and the load would grow with it — the residual market's cost always returns to the voluntary market.

Private Flood Beside a Public Program In the U.S., private insurers have begun writing primary residential flood cover alongside the National Flood Insurance Program. In Canada, private insurers offer overland flood endorsements but decline the highest-risk properties. Analyse the interaction in each.

Answer United States: where NFIP rates exceed a property's modelled risk, a private insurer can undercut them and take the policy; where NFIP rates are below cost, private writers leave the risk alone. The NFIP keeps a worsening mix — adverse selection against the public program. Moving NFIP rates toward risk-based pricing reduces the gap private writers exploit, at the cost of affordability for the highest-risk owners.

Canada: the voluntary market now covers most homes but not the highest-risk ones, which remain uninsured and reliant on disaster assistance. The policy question is whether a public high-risk pool should take them — a residual layer beneath a voluntary market, the reverse of the U.S. position.

In both, the program's design determines which risks the voluntary market keeps, and the voluntary market's choices determine what the program is left to insure.