...whose rating differs from (is lower than) sovereign rating by not more than one [notch*]?

* сегодня где-то видел, но не уверен, что правильно.

Заранее спасибо.

Examples of Sovereign Credit Ratings Standard & Poor's gives a BBB- or higher rating to countries it considers investment grade; below this (BB+ or lower), S&P deems them to be of speculative or "junk" grade. In 2019, for example, Zambia was given a B- grade, while Abu Dhabi, UAE received a AA. Fitch has a similar system. Moody’s considers a Baa3 or higher rating to be of investment grade, while a rating of Ba1 and below is non-investment grade. In 2019, for example, Bulgaria received a Baa2 rating, while Belgium was given a rating of Aa3. The ratings services explain their methodology on their websites. In addition to their letter-grade ratings, all three of these agencies also provide a one-word assessment of each country's economic outlook at that point in time: positive, negative, or stable.