Moody's Investors Service has upgraded the corporate rating of Navios Maritime Holdings after its $305m bond sale.

The rating has been moved to B3 from Caa1, and the probability of default rating to B3-PD from Caa1-PD.

The outlook is stable, the agency said.

"Navios Holdings successfully placed its senior secured bonds addressing its largest near-term maturity," said senior analyst Maria Maslovsky.