...November 25, 2020 NEW YORK (S&P Global Ratings) Nov. 25, 2020--S&P Global Ratings today raised its fund credit quality and volatility ratings on iShares iBonds Dec 2021 Term Muni Bond ETF (IBMJ) to '##+f/##+' from 'AAf/##'. At the same time, we raised our ratings on iShares iBonds Dec 2021 Term Corporate ETF (IBDM) to 'A+f/##+' from 'A-f/##'. The iShares iBonds Dec 2021 Term Muni Bond ETF seeks to track the investment results of an index composed of investment-grade U.S. municipal bonds maturing after Dec. 31, 2020, and before Dec. 2, 2021. The iShares iBonds Dec 2021 Term Corporate ETF seeks to track the investment results of an index composed of U.S. dollar-denominated, investment-grade corporate bonds maturing in 2021. We view BlackRock Fund Advisors (BFA), the investment manager, as strong. Within our management-scoring framework, we do not assess the credit culture or credit research of funds that are passively managed against an index. We assessed each exchange-traded fund's (ETF)...