But when it comes to the SEC's proposals on best execution and order competition, the industry pushback has been more pronounced.
The order competition proposal, where retail trades would be sent to an open auction before they can be executed internally, is designed to bring greater competition to the marketplace, SEC Chairman Gary Gensler said in December.
Currently, brokers route a far majority of stock orders to a small group of off-exchange dealers, known as wholesalers. Those wholesalers typically execute the orders internally, without any opportunity for other market participants to compete to provide better prices, the SEC said.
"These everyday individual investors don't have the full benefit of various market participants competing to execute their marketable orders at the best price possible," Mr. Gensler said at the SEC's December meeting. "For example, individual investors don't necessarily get the best prices that they could get if institutional investors, like pension funds, could systematically and directly compete for their orders."
However, the Council of Institutional Investors in a comment letter said their members are unlikely to expend much effort to participate in a new auction system if the rule were to go into effect.
"In particular, for many institutional investors, the risk of potentially revealing their identities and trade interest to even a single dealer by participating in the proposed new auction mechanisms could materially outweigh any potential benefits of receiving the executions," CII said. "Therefore, we encourage the commission to consider various ways to incentivize the interaction of retail and institutional investors."
Some commenters, including SIFMA, State Street Global Advisors, T. Rowe Price Group Inc. and Cboe Global Markets suggested that the SEC withdraw the proposal entirely.
On the best execution proposal, some commenters said there are already significant regulations in place, including the Financial Industry Regulatory Authority's best execution rule for broker-dealers.
CII in its comment letter said it supports a best execution rule out of the SEC but has concerns with a provision in the proposal that would exempt a broker or dealer when an "institutional customer, exercising independent judgment, executes its order against the broker or dealer's quotation," CII's comment letter said.
CII is worried that the proposed exemption "may result in some institutional investors, particularly smaller institutional investors with less market power, not obtaining the best execution they desire." It suggested the SEC reconsider the exemption and if it's deemed necessary, to narrow its scope or make it conditional.
BlackRock Inc. in its comment letter called on the SEC to eliminate the exemption for institutional customers.
"We believe that this clause is antithetical to the need for best execution in less transparent markets," BlackRock said. "In fixed income markets, where orders are typically traded principally against a broker-dealer's risk or inventory, transacting on a quotation is the dominant style of execution."