While the potential deal would result in a $54 billion automotive company, the world's third largest, any benefits for its credit outlook would come with a delay, they wrote in a research note. "We ... believe it will be difficult for them to produce significant effects quickly through expanding the scope of their collaboration to include batteries, software, and autonomous driving," S&P analysts said, but added the eventual impact on their creditworthiness would be significant. A merger would likely have a negative impact Honda's standalone credit outlook, while it should positively affect that of Nissan, they added.