Bitwise and Ark / 21Shares are offering zero fees for the first six months or the first $1 billion in assets.
Bitcoin's boosters say ETFs backed by the largest crypto token would represent a watershed moment for digital assets.
Money pouring into money markets is mostly from depositors leaving banks, analysts said, not from investors waiting for deals.
The BlackRock Total Return ETF, which began trading Thursday under the ticker BRTR, is an active fixed-income ETF.
Money has poured into bond ETFs of all stripes this year.
Ark and 21Shares have fired the opening volley in what industry experts predict will be an instantaneous race-to-the-bottom on fees.
The active ETF boom is almost entirely taking place in passive-looking trades.
“The Federal Reserve has overdone it," the fund manager said.
The average municipal bond closed-end fund is available at a double-digit discounts to its net-asset value.
In just three years, Dimensional Fund Advisors has catapulted into the top 10 U.S. ETF issuers.