Based on the provided facts and guidelines, here is the assessment of IBERDROLA SA's suitability for issuing hybrid bonds:

**1. Business Profile and Cash Flow Visibility:**
Iberdrola is a major global utility company with significant operations in regulated electricity and gas networks, as well as renewable generation. The provided text highlights its status as a "Regulated Utility" with a strong regulatory advantage, stable cash flows, and a large, diverse asset base. This aligns perfectly with the "Strongly Suitable" criterion of being a "Regulated, quasi-regulated, infrastructure-like, utility... with highly visible cash flows."

**2. Financial Metrics and Leverage:**
*   **S&P Net Debt / EBITDA:** 3.91x. This is a relatively high leverage ratio for a utility, typically sitting in the BBB rating category (Investment Grade, but lower tier).
*   **S&P FFO / Net Debt:** 0.1965 (approx. 19.7%). This is also consistent with a BBB profile.
*   **Moody's Trend:** Stable.
Hybrid bonds are particularly attractive for issuers in the BBB range because they can be treated as equity for rating agency purposes (up to certain limits), thereby improving leverage ratios (Net Debt/EBITDA) and coverage ratios (FFO/Debt). Issuing hybrids can provide "rating headroom" or help maintain the current rating despite high capital expenditure programs (indicated by the significant "Construction In Progress" and "Purchase of Property Plant And Equipment"). This fits the "Strongly Suitable" criterion: "Hybrid issuance could materially improve adjusted leverage, FFO/debt, or rating headroom."

**3. Issuance History and Market Access:**
*   **Issued hybrid bonds in 2021 or 2022:** Yes.
*   **First year of issuance:** 2013.
The fact that Iberdrola has an established history of issuing hybrid bonds (since 2013) and has issued them recently (2021/2022) is a very strong positive signal. The guidelines state: "Conversely, an entity having issued hybrid bonds is highly likely Strongly Suitable, or at least Marginally Suitable." The recurrence of issuance suggests it is a core part of their capital structure strategy, not just an opportunistic one.

**4. Use of Proceeds and Rationale:**
The company has substantial ongoing investment needs (Capex), evidenced by the increase in Noncurrent Assets and Construction in Progress. Hybrid bonds provide a flexible funding source for such long-term investments without immediately diluting equity or worsening senior debt metrics. This aligns with the "Strong refinancing, capex, or M&A funding rationale" criterion.

**5. Market Conditions:**
While swap rates and credit spreads widened in 2022 compared to 2020-2021, Iberdrola's investment-grade profile and essential utility status ensure strong investor appetite for its hybrids. The "Sub-Sen Delta" data indicates a premium for subordinated debt, but for a BBB utility, this cost is often justified by the rating benefit and equity-like treatment.

**Conclusion:**
Iberdrola SA fits all the key characteristics of a "Strongly Suitable" issuer: it is a regulated utility with stable cash flows, operates with leverage levels where hybrid equity treatment provides material rating benefits, has a clear capex funding need, and has a proven track record of accessing the hybrid bond market.

<answer>Strongly Suitable</answer>