BlackRock (BLK) Inc. (BLK) announced Monday the company's iShares unit would be launching a series of "initiatives to enhance the value proposition it delivers to investors" that will rebrand and slash expenses for six existing exchange-traded funds and introduce four new ETFs, three of which provide international equity exposure, and one core short-term U.S. bond fund. BlackRock is decreasing expense ratios by an average of eight basis points on its six existing funds - with the largest decrease (14 basis points) on its Total U.S. Bond Market fund, which tracks the BarCap U.S. Aggregate index.