American Electric Power Co. Inc.'s (AEP) consolidated 2023 financial measures were materially weaker than our downgrade threshold for the 'A-' rating. We also expect that the company's financial performance will remain pressured because of its robust capital spending program. Therefore, we downgraded AEP and all of its subsidiaries, excluding Kentucky Power Co. (KPCo), by one notch. This includes lowering our issuer credit rating (ICR) on AEP to 'BBB+' from 'A-'. At the same time, we affirmed all of our ratings on KPCo, including the 'BBB' ICR. The negative outlook on AEP and its subsidiaries reflects the company's minimal financial cushion relative to our downgrade threshold. In 2022 and 2023, AEP had capital spending of only about $6.7 billion and about