Low costs has been a major selling point for exchange traded funds, and with the U.S. Department of Labor’s new fiduciary rules shining a light on management fees, the increased competition could continue to pressure expense ratios.

ETFs are becoming cheaper. Just last week, BlackRock cut prices across its iShares Core ETF suite ahead of the new Department of Labor fiduciary rule changes, positioning its broad investment options as quality and cost-efficient alternatives in the fund space.

Fidelity Investments also announced on Tuesday that all the newly price-reduced U.S. iShares Core ETFs are available commission-free to ETF investors on the Fidelity platform.

Not to be outdone, Charles Schwab lowered fees on five ETFs to solidify its low-cost leadership in response to BlackRock’s latest expense ratio cuts.

SEE MORE: Schwab Responds to BlackRock’s Latest ETF Price War Salvo

While observers may argue that ETF providers are competing against one another in a bid to become the low-cost leader in the space, the money managers are loath to admit it. BlackRock has argued that the ETFs whose fees were reduced were those that would specifically benefit from the DOL’s fiduciary rule changes, reports Nicole Bullock for the Financial Times. Meanwhile, Schwab said its moves were not directly tied to the new rules and Vanguard Group has not made changes related to the rules either.

Nevertheless, industry watchers still believe that the increased competition could translate to more fee cuts around the corner.

“I don’t see how you cannot join the party,” Paul Ellenbogen, Morningstar’s head of global regulatory solutions, told the Financial Times. “It is not a defensible position to say, ‘I will be the high priced ETF.’ You can be the fancy hotel or the $300 bottle of wine, but there isn’t a marketable position for the high-priced ETF producer. It is kind of an oxymoron.”

SEE MORE: ETF Industry Edges Toward Free Core Products

Looking ahead, once the DOL rules are in effect, financial advisors may shift to low-cost, passive vehicles like index-based ETFs from traditional mutual funds.

According to Morningstar data, median fees for institutional class shares of actively managed large-cap stock and intermediate-term bond funds are 75 basis points and 50 basis points compared to the respective passive ETFs with a 30 basis point and 23 basis point expense ratio.

“An index fund won’t by definition underperform or outperform and the low cost accelerates the defensibility of the choice if you are looking at being sued under the new rules for not acting in the best interest of clients,” Ellenbogen added. “It is another hit. It is not as if actively managed funds were doing great before and [the new DOL rules]came along. This just puts more pressure on them.”

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