 Moodys Investors Service Moodys has downgraded to Aa2 from Aa1 the long-term ratings on the Remarketable Variable Rate Muni Term Preferred RVMTP shares issued by BlackRock Municipal 2030 Target Term Trust BTT. The downgrade of BTTs preferred share ratings was driven by a steady decline in the funds fixed charge coverage. At 31 October, BTTs annual fixed charge coverage stood at three times net investment income compared to four times for the same period a year ago. 