In order to remain competitive with firms such as Vanguard, BlackRock has confirmed it will cut its ETF fees in the fourth quarter 2012, reports Chris Flood of the Financial Times.

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However, the company will not cut charges across its entire iShares ETF range. Instead, it will reduce fees on a select number of U.S. products, says BlackRock chief executive Larry Fink.

He adds BlackRock still anticipates its margins would increase to more than 40% in the near future.

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Luke Montgomery, analyst at Bernstein Research, predicts BlackRock’s earnings could be reduced by 3% to 7% as a result. He has a 12-month share price target of $205 for the firm, and a “market-perform” rating.

This year, BlackRock’s share price has been flat (down 0.2%) at $177.83, underperforming the S&P 500 by 12.2%, reports Flood.