A.會(huì)計(jì)標(biāo)準(zhǔn)的根本性改變會(huì)導(dǎo)致沒(méi)有信用評(píng)級(jí)的債券信用利差上升
B.監(jiān)管環(huán)境的變化會(huì)導(dǎo)致某一特殊債券的信用評(píng)級(jí)上升
C.經(jīng)濟(jì)和預(yù)算環(huán)境的惡化會(huì)導(dǎo)致經(jīng)過(guò)信用評(píng)級(jí)機(jī)構(gòu)評(píng)級(jí)的債權(quán)的信用利差上升
D.信用評(píng)級(jí)下調(diào)引起的無(wú)風(fēng)險(xiǎn)利率長(zhǎng)期變化會(huì)導(dǎo)致債券的信用利差上升