Not seeing anything about a downgrade on the google. You have a link?
Also find it hard to believe that accounting and/or governance risk of a regulated guarantor would be high risk. Seems a bit absurd and would surely leave a news trace. I'm not finding any such news trace so again, a link would be appreciated. I'd just note that RiskMetrics shows both as Low Risk, which is what I'd expect.
Not doubting your word, btw, just find this extremely odd and would like to find out more. Thanks.