To estimate the credit trend for A2A Energia S.p.A. between 2021 and 2022, we follow the prescribed S&P methodology for Regulated Utilities (as A2A is a major Italian multi-utility).

### 1. Identify Industry
A2A S.p.A. and its subsidiary A2A Energia are integrated multi-utilities operating in generation, distribution, and supply. We apply the **Regulated Utilities** methodology.

### 2 & 3. 2021 Calculations (Reported data for 2021-01-01 to 2022-01-01)
*   **EBITDA:** 1,428,000,000 EUR
*   **Nonrecurring Items:** 0 EUR
*   **Adjusted_EBITDA:** 1,428,000,000 EUR
*   **Cash Interest:** Net Financial Interests 72,000,000 EUR
*   **Cash Taxes:** 36,000,000 EUR
*   **FFO (2021):** 1,428,000,000 - 72,000,000 - 36,000,000 = **1,320,000,000 EUR**

### 4, 5 & 6. 2021 Leverage and Coverage
*   **Total Debt (2021):** 4,322,000,000 (Noncurrent) + 746,000,000 (Current financial) = 5,068,000,000 EUR
*   **Eligible Cash:** 964,000,000 EUR
*   **Adjusted_Debt (2021):** 5,068,000,000 - 964,000,000 = **4,104,000,000 EUR**
*   **Debt/EBITDA (2021):** 4,104 / 1,428 = **2.87x**
*   **FFO/Debt (2021):** 1,320 / 4,104 = **0.32**

### 7 & 8. 2022 Calculations (Reported data for 2022-01-01 to 2023-01-01)
*   **EBITDA:** 1,505,000,000 EUR
*   **Nonrecurring Losses (Adjusted out):** -157,000,000 EUR (Net of nonrecurring items included in Profit/Loss)
*   **Adjusted_EBITDA:** 1,505,000,000 - 157,000,000 = **1,348,000,000 EUR**
*   **Cash Interest:** 90,000,000 EUR
*   **Cash Taxes:** 344,000,000 EUR
*   **FFO (2022):** 1,348,000,000 - 90,000,000 - 344,000,000 = **914,000,000 EUR**

### 9, 10 & 11. 2022 Leverage and Coverage
*   **Total Debt (2022):** 5,867,000,000 (Noncurrent) + 1,022,000,000 (Current) = 6,889,000,000 EUR
*   **Eligible Cash:** 2,584,000,000 EUR
*   **Adjusted_Debt (2022):** 6,889,000,000 - 2,584,000,000 = **4,305,000,000 EUR**
*   **Debt/EBITDA (2022):** 4,305 / 1,348 = **3.19x**
*   **FFO/Debt (2022):** 914 / 4,305 = **0.21**

### 12. Credit Trend Classification
*   **Signal 1 (Leverage):** 3.19x - 2.87x = **+0.32x**. Threshold ≥ +0.2x indicates **Deteriorating**.
*   **Signal 2 (Coverage):** 0.21 - 0.32 = **-0.11**. Threshold ≤ -0.03 indicates **Deteriorating**.

Both signals indicate a deteriorating trend due to increased debt levels and lower FFO (driven largely by higher taxes and interest).

<answer>Deteriorating</answer>