USE OF SYMBOLS in credit rating

Simranjeet Singh (Proprietor at S Simranjeet & Associates Company Secretaries)   (4396 Points)

23 November 2010  

Hello everyone can any one tell me why + or - symbols are attached to instruments while assigning credit rating to them ?

 

is this to convey that an instrument with "+" sign have higher rating compared to instrument with " -" sign or vice versa ??? if it is correct then it is always be the same ???  for eg a instument with "AA -" rating is stonger than rating in a lower category such as "A +" or what ???