Concentration, Correlation, and the Limits of Capacity
Updated: Aug 12
Why Florida's Property Insurance Market Faces Structural Reconstitution Risk and What a Six-Pillar Reform Framework Can Do About It
Don D. Brown
Former Chairman, Florida House Insurance Committee (2007–2008)
Member, Florida Hurricane Catastrophe Fund Advisory Council | Member, Florida Building Commission
Submitted for Academic Review | April 2026
Version 9, revised August 2026; supersedes Version 8, April 2026
ABSTRACT
Florida's property insurance market has achieved surface stability since the legislative reforms of 2022 and 2023. Premium growth has moderated, private capital has cautiously returned, and Citizens Property Insurance Corporation has depopulated substantially from its 2023 peak. These developments have led some scholars to conclude that catastrophe risk financing capacity remains adequate for Florida's needs.3 This paper argues that such conclusions, while accurately describing present market conditions, are structurally insufficient because they evaluate current capacity without accounting for the trajectory of correlated risk concentration driving that capacity toward its functional limit.
This paper introduces the Risk Concentration Index (RCI), a composite metric designed to measure the structural vulnerability of a coastal insurance market rather than the financial health of individual participants.3 The RCI integrates five components — coastal exposure value, total state insured value, hurricane frequency patterns, building vulnerability, and population density — into a single indicator that tracks the cumulative accumulation of correlated risk. Current RCI calculations place Florida at approximately 58 on a 100-point scale, with the critical stress region commencing at 64 to 68 and documented market reconstitution in comparable jurisdictions occurring above 70. On current growth trajectories, Florida is projected to enter the critical stress region between 2028 and 2030.
The paper argues that the relevant policy question is not whether capacity currently exists to finance catastrophic risk — it demonstrably does — but whether that capacity will persist as the RCI crosses the dysfunction threshold. The paper further argues that capacity-centric analysis systematically understates structural risk because it evaluates market snapshots rather than the accumulation dynamics that determine long-term insurability. A six-pillar reform framework — the Florida Resilience Doctrine — is proposed as the integrated response required to govern how far the index travels beyond that threshold and how long it remains there.
Keywords: catastrophe risk financing, insurance market concentration, correlated risk, Risk Concentration Index, Florida property insurance, residual market, insurability thresholds, managed retreat, pre-event capitalization
A Note on Terminology
Throughout this paper, the terms "market dysfunction," "insurability failure," and "market reconstitution" are used in preference to the more colloquial "market collapse." This choice reflects precision rather than optimism. Private insurance markets do not simply disappear; they fail to function under conventional structures and are reconstituted — typically through government substitution, federalization, or fundamental structural reorganization — at far greater cost and with far less protection for policyholders than would have been available through proactive reform. The distinction matters because it makes clear that the question is not whether Florida's market can reach a point of insurability failure, but what form that failure takes, how it is financed, and who bears the cost. The historical calibration cases discussed in Section III.E — Hawaii, Louisiana, and Puerto Rico — are instructive precisely because they document not the disappearance of insurance in those markets, but its involuntary reconstitution under conditions that imposed enormous and inequitable costs on policyholders, taxpayers, and future generations who had no voice in the decisions that created those conditions.
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