Generally, equity-based models for credits have to be analyzed in the context of the leverage cycle. When the level of debt remains constant, equity as well as credit investors both benefit from rising equity prices, driven, for example, by increasing earnings estimates. When leverage is rising like, for instance, between 1997 and 2000, equities tend to perform well while credit spreads widen at the same time. Conversely, deleveraging through rights issues or asset disposals, cost cutting and dividend cuts provide a favorable environment for credit, but not for equities. As Figure 3.24 shows, there is undoubtedly a relationship between equity prices and credit spreads. Yet, this relationship varies over time, depending on the current and the expected fundamental environment in the future.

Models that only relate credit spreads to equity prices therefore need to be interpreted cautiously. Assume, for example that the management of a company signals its willingness to concentrate on the creation of shareholder value. Then the probability of leveraging increases substantially. If there has been no decoupling, credit investors should take that as a sign to be rather bearish.