I'll analyze EDP's capital structure and determine the appropriate reliance on hybrid bonds.

## Key Financial Analysis

**Company Profile:**
- EDP is a large, regulated utility company (generation, transmission, distribution, supply of electricity and gas)
- Based in Portugal, with significant international operations (including North America)
- Investment-grade caliber company given its size and regulated nature

**Capital Structure Observations:**
- Total Assets (2022): €58.8B
- Total Equity: €13.8B (23.5% of assets)
- Long-term Borrowings: €15.8B
- Current Borrowings: €4.2B
- Total Debt: ~€20B
- Significant non-controlling interests: €5.0B
- Leverage is substantial but typical for a utility

**Profitability:**
- Revenue grew 38% YoY to €20.7B
- Net income: €1.17B (relatively stable)
- EBITDA proxy: ~€4.5B
- Interest coverage (EBIT/Finance costs): €2.53B/€1.75B ≈ 1.4x (relatively tight)

**Why Hybrid Bonds Make Sense for EDP:**

1. **Utility sector fit**: Utilities are classic hybrid bond issuers. The regulated, predictable cash flows support the fixed-charge nature of hybrids while benefiting from the equity credit rating agencies assign (typically 50% equity treatment).

2. **Leverage management**: With significant debt levels and tight interest coverage, hybrid bonds can improve credit metrics by receiving partial equity treatment from rating agencies without diluting shareholders.

3. **Rising rate environment**: The swap curve data shows rates moved dramatically higher in 2022 (5Y from -0.264% to 1.726%). Hybrids issued in this environment would be more expensive, but the equity credit benefit remains valuable.

4. **Credit spread environment**: Corporate bond spreads (iShares Core Euro Corp Bond) and subordination deltas remain moderate, suggesting the market is receptive to hybrid issuance.

5. **Large capex needs**: EDP is investing heavily in renewables (€3.5B capex in 2022), requiring ongoing financing. Hybrids help diversify funding without excessive leverage deterioration.

**Why Not 100% or 75%:**
- Hybrid bonds are more expensive than senior debt
- Rating agencies cap equity credit (usually at 10-15% of total capitalization)
- The market for hybrids is smaller; over-reliance would be impractical
- Senior secured/unsecured debt remains the backbone of utility financing

**Why Not 0%:**
- EDP's profile is ideally suited for hybrids
- Many European utilities (including EDP historically) use hybrid bonds
- The equity credit benefit is particularly valuable given leverage levels

**Appropriate Level:**
A moderate allocation to hybrids (around 25% of the capital structure optimization) is typical for large European utilities. This provides meaningful equity credit benefits while keeping overall financing costs manageable. EDP's tight coverage ratios and large investment program support a meaningful but not dominant hybrid allocation.

<answer>25%</answer>