(Bloomberg News) Pacific Investment Management Co.'s first active exchange-traded fund to be run by Bill Gross will charge annual fees of 0.55 percent, as the firm seeks to expand in the fastest-growing industry segment.

Pimco disclosed the cost for the Pimco Total Return Exchange-Traded Fund in a filing today with the U.S. Securities and Exchange Commission. Newport Beach, California-based Pimco said in April it planned an ETF that will follow a strategy similar to Gross's top-ranked $242.8 billion Total Return bond mutual fund. The institutional share class of the mutual fund, available in some retirement accounts, carries an expense ratio of 0.46 percent, while the fund's most widely used retail share classes charge fees ranging from 0.75 percent to 0.85 percent.

Gross, 67, is the most prominent fund manager to offer his investment strategy in an ETF format. Total Return, the world's largest mutual fund, has climbed an average of 9 percent annually in the past five years to beat 99 percent of peers, according to data compiled by Bloomberg. Pimco, which is diversifying beyond bond mutual funds under Chief Executive Officer Mohamed El-Erian, pushed into ETFs two years ago.

"This has been a very deliberate and thoughtful process," Don Suskind, head of Pimco's ETF product-management group, said in an interview. "Through the ETF vehicle, we thought there could be a broader set of investors that can access the Total Return strategy."

ETF Surge

In offering an ETF version of its Total Return approach, Pimco sought to satisfy demand from financial advisers who are increasingly using ETFs to allocate money for their clients, Tammie J. Arnold, a Pimco managing director, said in an interview.

ETF assets have surged more than 10-fold since 2001 to more than $1 trillion as of May, according to the Washington-based Investment Company Institute.

The funds hold baskets of securities while trading throughout the day like stocks. Actively run versions seek to combine the skill of a manager selecting investments with the trading flexibility and tax advantages of ETFs, which typically track an index. Thirty-four actively managed ETFs tracked by Bloomberg collectively hold about $5.1 billion in assets. The funds have an average expense ratio of 0.63 percent, according to data compiled by Bloomberg.

No Derivatives

Unlike the Total Return mutual fund, which uses a combination of options, futures and swap agreements, Gross's ETF cannot invest in such derivatives. The SEC said in March 2010 it wouldn't approve new ETFs that make significant use of derivatives, pending a review of the practice that is still ongoing. Should the SEC lift the freeze, the Total Return ETF would invest in derivatives, Pimco said in its April filing.

Pimco manages $3.4 billion globally in 18 ETFs, including seven that are actively managed. In the U.S., Pimco has four actively managed ETFs. Expense ratios for Pimco's four actively managed U.S. ETFs range from 0.35 percent to 0.45 percent, according to the firm's website.

So far, Pimco's actively managed ETFs have focused on highly liquid markets, such as Treasuries, where other investors mimicking the trades are less likely to affect prices. Fixed- income investments are also more difficult to copy because transactions don't occur on an open exchange.

Pimco wasn't very concerned that traders would try to mimic Gross's trades because his management style involves using a "risk-based approach," allowing him to use a range of securities to achieve his investments goals, Arnold said.

"It is more of a concern in the active-equity space," Arnold said.

Pimco Total Return Exchange-Traded Fund will trade under the ticker symbol TRXT, the firm said in April.