https://www.insurerbrain.com/w/index.php?action=history&feed=atom&title=Definition%3ASharpe_ratio 2026-04-29T21:18:48Z Revision history for this page on the wiki MediaWiki 1.43.8 https://www.insurerbrain.com/w/index.php?title=Definition:Sharpe_ratio&diff=9885&oldid=prev 2026-03-11T05:56:00Z

<p>Bot: Creating new article from JSON</p> <p><b>New page</b></p><div>📋 &#039;&#039;&#039;Sharpe ratio&#039;&#039;&#039; is a risk-adjusted performance metric that measures the excess [[Definition:Return on investment | return]] earned per unit of volatility, widely used within the insurance industry by [[Definition:Insurance company | insurers]], [[Definition:Reinsurance | reinsurers]], and insurance-focused [[Definition:Institutional investor | institutional investors]] to evaluate the efficiency of [[Definition:Investment portfolio | investment portfolios]], [[Definition:Insurance-linked securities (ILS) | insurance-linked securities (ILS)]] allocations, and even the risk-adjusted profitability of [[Definition:Underwriting | underwriting]] books. In insurance, the ratio helps decision-makers compare opportunities that carry very different risk profiles—such as a [[Definition:Catastrophe bond | catastrophe bond]] fund versus a fixed-income portfolio backing [[Definition:Loss reserves | loss reserves]].<br /> <br /> ⚙️ Calculated by subtracting the risk-free rate from the portfolio&#039;s (or strategy&#039;s) return and dividing by the standard deviation of those returns, the Sharpe ratio distills the trade-off between reward and variability into a single number. A higher ratio signals more return per unit of risk. Within an insurer&#039;s [[Definition:Asset-liability management (ALM) | asset-liability management]] framework, investment teams use it to optimize the asset mix supporting [[Definition:Policyholder | policyholder]] obligations—balancing [[Definition:Yield | yield]] targets against [[Definition:Regulatory capital | regulatory capital]] charges and [[Definition:Solvency | solvency]] constraints. [[Definition:Insurance-linked securities (ILS) | ILS]] fund managers similarly market their Sharpe ratios to prospective investors, highlighting the historically low correlation of [[Definition:Catastrophe risk | catastrophe risk]] returns with broader financial markets.<br /> <br /> 💡 Relying solely on the Sharpe ratio can be misleading in insurance contexts, where return distributions are often skewed—[[Definition:Catastrophe loss | catastrophe losses]], for instance, produce fat tails that standard deviation alone does not capture well. Sophisticated insurers and [[Definition:Reinsurer | reinsurers]] therefore pair the Sharpe ratio with complementary measures such as the [[Definition:Sortino ratio | Sortino ratio]] or tail-risk metrics to form a fuller picture. Despite its limitations, the Sharpe ratio remains a foundational tool in conversations between [[Definition:Chief investment officer (CIO) | chief investment officers]], [[Definition:Rating agency | rating agencies]], and [[Definition:Insurance regulator | regulators]] when assessing whether an insurer&#039;s investment strategy is appropriately calibrated to the risks it underwrites.<br /> <br /> &#039;&#039;&#039;Related concepts:&#039;&#039;&#039;<br /> {{Div col|colwidth=20em}}<br /> * [[Definition:Insurance-linked securities (ILS)]]<br /> * [[Definition:Asset-liability management (ALM)]]<br /> * [[Definition:Catastrophe bond]]<br /> * [[Definition:Return on equity (ROE)]]<br /> * [[Definition:Investment portfolio]]<br /> * [[Definition:Solvency]]<br /> {{Div col end}}</div>

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