Speech at the Institute and Faculty of Actuaries
There is a concern that Solvency II as a negotiated compromise has created risks to our primary objectives. The Fundamental Spread does not include explicit allowance for uncertainty around defaults and downgrades, and appears low compared with ranges implied by academic literature for the credit risk portion of spreads. Second, the Fundamental Spread is not sensitive to changes in credit market conditions and changes little as spreads change over time. This means that any increase in spreads not accompanied by a downgrade is assumed to be entirely due to increased illiquidity of the assets, and therefore taken credit for as Matching Adjustment. Finally, the Fundamental Spread is not sensitive to risk and spread across asset classes, and thus assets that have the same rating but higher spreads will attract a higher Matching Adjustment despite what can appear to be a higher level of credit risk. This creates a risk of adverse selection based around the regulatory rules.
My emphasis.