I'll analyze Bouygues' financial position and determine the appropriate hybrid bond issuance level based on the provided data and guidelines.

## Key Financial Data Analysis

### Current Position (2022)
- **Total Assets**: €60.6 billion (2023-01-01) vs €44.6 billion (2022-01-01) — significant growth of ~36%
- **Equity**: €13.9 billion
- **Net Debt**: €7.44 billion (up from €0.94 billion in 2021)
- **S&P Net Debt / EBITDA**: 3.26
- **S&P FFO / Net Debt**: 0.2446 (relatively weak)
- **Moody's adjusted leverage trend**: Deteriorating

### Major Changes in 2022
The balance sheet expanded dramatically due to acquisitions:
- **Goodwill increased**: from €7.4B to €12.6B (+€5.2B)
- **Property, Plant & Equipment**: from €8.0B to €9.2B
- **Right-of-use assets**: from €1.7B to €2.5B
- **Intangible assets**: from €2.8B to €4.0B
- **Cash flows used in obtaining control of subsidiaries**: €6.3B (vs €0.4B prior year) — major M&A activity

### Debt Structure
- Long-term borrowings: €11.6B (up from €5.8B)
- Total debt increased significantly with acquisition financing

### Profitability
- Revenue: €44.3B (up from €37.6B)
- Operating profit: €1.87B
- Net profit: €1.13B (down from €1.31B)
- Profit attributable to owners: €973M (down from €1,125M)

### Hybrid Bond History
- **Never issued hybrid bonds**
- No current hybrids in capital structure

### Interest Rate Environment (2022)
- Swap rates turned sharply positive: 5Y at 1.726%, 7Y at 1.806%, 10Y at 1.927%
- Corporate bond spreads: iShares Core Euro Corp Bond at 1.085%
- Sub-senior delta for non-financial IG: 2.295%

## Assessment Against Guidelines

| Factor | Assessment |
|--------|-----------|
| Refinancing needs | **Moderate to high** — significant debt increase from acquisitions |
| Credit metrics deterioration | **Yes** — Moody's says "Deteriorating"; Net Debt/EBITDA at 3.26; FFO/Net Debt weak at 0.24 |
| Rating headroom | **Constrained** — metrics weakened, leverage elevated |
| Capex/M&A intensity | **High** — €6.3B acquisition spend in 2022, major balance sheet expansion |
| Current hybrid presence | **None** — never issued |
| Cost of hybrid vs debt | **Marginal impact** — rates rose in 2022 but hybrid costs would be in line with rising rate environment |

## Sector Considerations

Bouygues is a diversified conglomerate (construction, media, telecom), not a pure regulated utility. The S&P methodology provided covers:
- Regulated utilities (low volatility, stable cash flows)
- Oil & gas E&P (high volatility)
- Unregulated power & gas
- Transportation infrastructure

Bouygues' operations (construction, media/Telecom) don't fit neatly into these categories. Construction is cyclical with project-based cash flows. The TF1 media business and Bouygues Telecom have different characteristics. This **diversification reduces pure-utility-like stability** but also provides revenue diversity.

## Critical Factors for Decision

**Arguments FOR hybrid issuance (7.5%-11.25% range):**
- Net debt increased dramatically (€0.94B → €7.44B)
- Major acquisitions in 2022 (€6.3B cash outflow)
- Leverage metrics deteriorated per Moody's
- FFO/Net Debt at 0.24 is relatively weak
- Significant goodwill created (€12.6B), suggesting integration risk

**Arguments AGAINST higher hybrid issuance (pushing toward 0%-3.75%):**
- **Never issued hybrids before** — strong negative signal per guidance
- No current hybrids in structure
- Company has managed without them historically
- Rating still likely investment grade; not in "A" range but not distressed
- 2022 was a specific acquisition year; may not repeat

**Rate environment consideration:**
- 2022 saw sharp rate increases (from negative/near-zero to ~1.9% for 10Y swaps)
- Hybrid costs would be higher than historical levels
- However, the cost would be "marginal" relative to already-increased debt costs

## Synthesis

The guidance states: "an entity's previous levels of hybrid bond issuance is a *strong* indicator of a reasonably advisable level for the next 18 months. In particular, if the entity has not issued hybrid bonds recently, it is a reliable signal that it has reasons not to do so either in the future."

Bouygues has **never issued hybrid bonds**. This is a very strong signal that:
1. The company has historically found alternative financing sufficient
2. Management may be philosophically opposed or structurally constrained
3. The capital structure has functioned without this instrument

However, 2022 represents a **material change**:
- Balance sheet grew 36%
- Net debt increased 8x
- Major acquisitions completed
- Credit metrics deteriorated

The company is at an inflection point. With Net Debt/EBITDA at 3.26 and FFO/Net Debt at 0.24, there's meaningful leverage pressure. The 2022 acquisitions (likely including Eurovia or other construction assets) created a larger, more leveraged entity.

Given:
- The **never-issued** history suggests caution (would normally point to 0%)
- But the **deteriorating metrics and major M&A** suggest some utility for hybrids

The moderate position is **3.75%**:
- This provides "limited but useful rating flexibility"
- Acknowledges funding needs without overcommitting given no hybrid history
- Mild leverage optimization rationale fits the post-acquisition deleveraging need
- Cost will increase debt cost but provides diversification

However, looking more carefully at the magnitude of change:
- €7.44B net debt vs €13.9B equity = 53% gearing
- Total adjusted capital ~€21.3B; 3.75% = ~€800M; 7.5% = ~€1.6B

Given the **very strong signal of never issuing**, and that 2022 appears to be a peak acquisition year rather than a sustained transformational program, I lean toward the lower end. The maximum per year is €3B, but starting from zero with no history suggests modest initial steps.

The 3.75% level fits "moderate funding needs" and "mild leverage optimization" — Bouygues has funding needs from its acquisition debt and deteriorating metrics, but this isn't an existential rating threat requiring 11.25%-15%.

<answer>3.75%</answer>