(12)Directive (EU) 2025/2 amended the rules governing the volatility adjustment by requiring that the volatility adjustment is subject to supervisory approval and by requiring that its calculation takes into account undertaking-specific characteristics related to the spread sensitivity of assets and the interest rate sensitivity of the best estimate of technical provisions. In addition, the volatility adjustment is not to reflect the portion of the spreads that is attributable to a realistic assessment of expected losses or unexpected credit or other risk. Article 77d(3) of Directive 2009/138/EC as amended by Directive (EU) 2025/2 provides that such portion is to be calculated as percentage of the spreads, and is to decrease as spreads increase. Empirical economic studies confirm that for corporate bonds, the major part of spreads reflect genuine credit risk, in particular where spreads are at low-to-medium levels. Therefore, where spreads on corporate bonds and loans do not exceed their long-term average, the percentage applied to determine the risk correction should not be lower than 50 %.