Explanation

A steeper credit spread curve means that the difference between long-term and short-term credit spreads increases.

Option A: An increase in equity volatility typically leads to a steeper credit spread curve because:

• Higher volatility increases uncertainty about future credit conditions
• Investors demand higher compensation for long-term credit risk
• Short-term spreads may not increase as much due to immediate liquidity and market conditions

Option B: An improved overall economic climate would typically flatten the credit spread curve as economic uncertainty decreases across all time horizons.

Option C: The issuance of fewer long-term bonds with the same rating would likely flatten the curve due to supply-demand dynamics (less supply of long-term bonds could reduce long-term spreads).

Therefore, increased equity volatility is most likely to result in a steeper credit spread curve.