TOKYO (Reuters) - Moody's Ratings said on Friday it has downgraded its rating of Nissan Motor ( NSANF ) credit by one notch to junk status, citing a weak and worsening outlook for the Japanese automaker's credit profile.

The credit-rating firm cut Nissan's ( NSANF ) senior unsecured rating to Ba1 from Baa3 and maintained its negative outlook.

In a report, senior analyst Dean Enjo cited "risks associated with the implementation of its new restructuring plan, the renewal of its aging product range and global trade policies".

Last month, S&P Global Ratings revised the automaker's credit outlook to negative and stable and affirmed its BB+ rating.

Last week, Nissan ( NSANF ) ended talks with Honda Motor for a possible merger, pitching it deeper into uncertainty.