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📋 '''Mass lapse event''' refers to a scenario in which a significant proportion of [[Definition:Policyholder | policyholders]] simultaneously surrender, cancel, or fail to renew their [[Definition:Insurance policy | insurance policies]], creating a sudden and severe drain on an [[Definition:Insurance undertaking | insurer's]] liquidity and financial position. Within [[Definition:Solvency II | Solvency II]], the mass lapse stress is a defined component of the [[Definition:Life underwriting risk | life underwriting risk]] module, requiring insurers to model the instantaneous lapse of a prescribed percentage of policies — typically 40% of in-force contracts where surrender leads to a loss for the insurer. While the concept originates in life insurance modeling, analogous concentration risks exist in non-life books where large [[Definition:Policyholder | policyholder]] segments could exit simultaneously.

⚙️ The mechanics of a mass lapse stress test are straightforward in principle but complex in execution. An insurer must identify which policies carry a positive [[Definition:Surrender value | surrender value]] or where lapse would crystallize a loss — for instance, where the insurer has incurred heavy upfront [[Definition:Acquisition cost | acquisition costs]] that have not yet been recouped through future [[Definition:Premium | premium]] income. Under the Solvency II [[Definition:Standard formula | standard formula]], the firm applies the prescribed lapse rate shock to those policies and measures the resulting drop in [[Definition:Basic own funds | basic own funds]]. Firms using [[Definition:Internal model | internal models]] may calibrate the shock differently, reflecting their own portfolio composition and historical experience. Beyond the capital impact, a mass lapse event also creates acute [[Definition:Liquidity risk | liquidity risk]]: if a wave of surrenders occurs in a [[Definition:Life insurance | life]] or [[Definition:Annuity | annuity]] portfolio, the insurer may need to liquidate [[Definition:Investment portfolio | investment assets]] at unfavorable prices to fund payouts, potentially triggering a downward spiral.

💡 Although a full-blown mass lapse event has rarely materialized at the extreme levels assumed in regulatory stress tests, the scenario is far from hypothetical. Episodes of elevated lapse activity have occurred during periods of rapidly rising interest rates, when policyholders in savings-oriented products move capital to higher-yielding alternatives, and during crises of confidence in individual carriers. The collapse of several life insurers in Japan during the late 1990s and early 2000s saw accelerated policyholder withdrawals compound underlying solvency problems. Regulators treat mass lapse risk as a cornerstone of prudential supervision because it captures a feedback loop that other risks do not: the insurer's own perceived weakness can trigger the very event that deepens its distress. Beyond Solvency II, frameworks such as [[Definition:Life Insurance Capital Adequacy Test (LICAT) | LICAT]] in Canada and the [[Definition:Risk-based capital (RBC) | risk-based capital]] approach in the United States incorporate lapse risk charges, though the calibration and methodology differ.

'''Related concepts:'''
{{Div col|colwidth=20em}}
* [[Definition:Life underwriting risk]]
* [[Definition:Lapse risk]]
* [[Definition:Surrender value]]
* [[Definition:Solvency capital requirement (SCR)]]
* [[Definition:Liquidity risk]]
* [[Definition:Policyholder behavior]]
{{Div col end}}

Definition:Mass lapse event - Revision history

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