I don't claim to understand the whole sphere of economics but it's just a prediction, which can equally be countered by another prediction. I guess the rate is for the year TO April anyway, not just the month.
But indeed, to my inexperienced eye, that's what they seem say here:-
But on the other hand, UniCredit Bulbank seemed to disagree, albeit in March 2015:-
http://wire.seenews.com/news/bulgaria-t ... nk-469042#
Guesses all of 'em, educated or not..... I think I'll just carry on checking how much spare change I've got left at the end of each month....