To estimate the credit trend for Iberdrola S.A. from 2021 to 2022, we apply the S&P methodologies for Regulated Utilities.

### Step 1: Identify Industry
Iberdrola S.A. is a multinational electric utility company, primarily focused on regulated networks and renewable energy generation. The "Regulated Utilities" methodology is appropriate.

### Steps 2-6: 2021 Calculations (EUR millions)
*   **Adjusted_EBITDA:** Beneficio Bruto De Explotacion Ebitda (12,006). (We assume no major non-recurring adjustments or pension distortions are provided in the data). = **12,006**
*   **FFO:** Adjusted_EBITDA (12,006) - Cash Interest (2,268 - assume all is cash) - Cash Taxes (832) = **8,906**
*   **Adjusted_Debt:** Noncurrent Financial Liabilities (37,175) + Current Financial Liabilities (21,297) - Cash (3,427) = **55,045**
*   **Leverage (Debt/EBITDA):** 55,045 / 12,006 = **4.58x**
*   **Coverage (FFO/Debt):** 8,906 / 55,045 = **0.1618**

### Steps 7-11: 2022 Calculations (EUR millions)
*   **Adjusted_EBITDA:** Beneficio Bruto De Explotacion Ebitda (13,228) = **13,228**
*   **FFO:** Adjusted_EBITDA (13,228) - Cash Interest (3,042) - Cash Taxes (1,055) = **9,131**
*   **Adjusted_Debt:** Noncurrent Financial Liabilities (44,216) + Current Financial Liabilities (25,079) - Cash (4,608) = **64,687**
*   **Leverage (Debt/EBITDA):** 64,687 / 13,228 = **4.89x**
*   **Coverage (FFO/Debt):** 9,131 / 64,687 = **0.1411**

### Step 12: Trend Analysis
*   **Signal 1 (Leverage):** 4.89x - 4.58x = **+0.31x**. (Deteriorating, as ≥ +0.2x)
*   **Signal 2 (Cash-flow coverage):** 0.1411 - 0.1618 = **-0.0207**. (Stable, as between -0.03 and +0.03)

**Synthesis:**
The leverage ratio has increased significantly (+0.31x), exceeding the "Deteriorating" threshold. The FFO/Debt coverage ratio has declined by 2.07 percentage points, which falls within the "Stable" range according to the threshold (±0.03). Given that the increase in debt significantly outpaced the growth in EBITDA and FFO, the overall direction of the credit profile is worsening. Following the conservative bias instruction where one signal is "Deteriorating" and the other is "Stable", we classify the trend as Deteriorating.

<answer>Deteriorating</answer>