To determine the appropriate amount of hybrid bonds for VERBUND AG, we must evaluate the company's financial metrics, its business position under the S&P methodology for Regulated Utilities and Unregulated Power & Gas, and its funding and leverage needs.

**1. Financial Position and Leverage:**
VERBUND AG has a strong balance sheet with low leverage. For the fiscal year ended December 31, 2022:
- Total Equity: €8.32 billion
- Total Financial Liabilities (Noncurrent + Current): €2.84 billion + €1.11 billion = €3.95 billion
- Adjusted Debt (approx. Financial Liabilities): €3.95 billion
- Total Adjusted Capital (Equity + Adjusted Debt): €8.32 billion + €3.95 billion = €12.27 billion
- Debt-to-Capital: 32%
- FFO to Debt: Using 2022 operating cash flow (€2.02 billion) minus interest paid (€36.1 million) and taxes paid (€343.1 million), FFO is approximately €1.64 billion. FFO/Debt is ~41.5%. 

This places VERBUND well within the "A" range for regulated utilities (which typically tolerate up to 60% leverage for 'A' ratings under low volatility) and unregulated power (up to 45% for 'BBB+' and 35% for 'A-'). The company has immense rating headroom and no significant leverage pressure. 

**2. Refinancing and Funding Needs:**
- Cash flow from operations in 2022 was €2.02 billion, and EBITDA was €3.16 billion. 
- Capex for 2022 was €1.09 billion. The company easily funds its maintenance and growth capex internally, generating substantial free cash flow even after dividends (€460 million).
- Current maturities of debt are manageable, and the company has robust liquidity (€409 million cash + credit facilities).
- The company has moderate, non-transformational growth capex needs typical for an energy transition utility, but these are largely self-funded by its exceptionally high cash generation.

**3. Current Capital Structure and Cost of Debt:**
- The entity does not appear to have existing hybrid bonds in its capital structure. 
- The current cost of debt is low. With 5Y/7Y swap rates rising to ~1.7%-1.8% in 2022 and IG corporate spreads at ~1.1%-2.3%, VERBUND's cost of debt is likely in the 2.5%-3.5% range.
- Issuing a hybrid bond (which requires a significant step-up and subordination premium) would materially increase the company's current cost of debt. For an 'A' rated utility with strong cash flow, the marginal benefit to leverage metrics does not offset the higher interest expense, especially since the leverage metrics are already highly conservative. 

**4. S&P Sector Methodology:**
As a utility with strong regulatory advantage (Austrian/regional frameworks) and unregulated hydro/power generation assets that benefit from long-term contracts and renewable support, VERBUND operates in a low/medial volatility environment. This permits higher standard leverage tolerances. The company does not need to engineer its capital structure with hybrids to achieve or preserve an investment-grade rating, as it is comfortably positioned at the strong end of the IG spectrum.

**Conclusion:**
VERBUND AG has minimal refinancing needs, extraordinary free cash flow generation, an "A" range rating profile, and no current hybrids. Issuing hybrids would unnecessarily increase the cost of debt without meaningfully improving an already rock-solid rating headroom or leverage trajectory. Therefore, the advised utilization of hybrid bonds should be 0%.

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