NEW YORK (Standard&Poor's) Dec. 13, 2013--Standard&Poor's Ratings Services today said it assigned its 'A-f' fund credit quality and 'S1' fund volatility ratings on the iShares Liquidity Income ETF. The fund is an actively managed exchange-traded fund (ETF) that does not seek to replicate the performance of a specified index. The fund credit quality rating is based on our analysis of the credit quality of the portfolio's eligible investments, the counterparties, and overall management. The 'A-f' rating signifies that the portfolio holdings provide strong protection against losses from credit defaults. The iShares Liquidity Income ETF's investment objective is to provide current income consistent with preservation of capital. The fund seeks to achieve its investment objective by investing,