“The downgrade reflects our view that worsening market conditions are likely to cause Yang Ming's profitability and cash flow to be substantially weaker than our earlier prediction,” the rating agency said in a statement.
The weakening profitability could affect Yang Ming's bottomline over the next two to three quarters, Taiwan Ratings added.
Taiwan Ratings, however, said Yang Ming's long-term rating outlook will be stable.
In the first-half of this year, Yang Ming suffered a net loss of NT$2.55bn ($84.2m) as against a net profit of NT$2.76bn a year ago.