(Bloomberg) -- BlackRock, the largest provider of ETFs, cut fees on seven U.S. listed ETFs aimed at price-conscious investors, as competition for market share heats up.

The firm is reducing the expense ratios for the funds -- all part of its series of “core” ETFs -- to as low as 0.03%, according to a statement by the New York-based money manager. It also introduced the iShares Core International Aggregate Bond ETF, which tracks an index of international investment grade bonds while hedging foreign currency risk.

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