Standard & Poor's on Wednesday raised Hellenic Telecommunication Organization's (OTE) long-term credit rating to BBB- with a positive outlook, offering the telecoms company an investment grade.

Canadian credit rating firm DBRS enhanced Greece's long-term credit rating to a "B", from a previous ranking of "CCC", along with a better grade of "stable" from "negative" regarding its rating outlook, according to reports.

Greece has been upgraded by two slots to Caa3, by Moody's credit rating agency, up from C where it had been relegated in may 2012, on Friday.
Moody's also assigned Greece a stable outlook, and a Not Prime (NP) short term assessment.