The U.S. Securities and Exchange Commission (SEC) on Thursday approved applications from Nasdaq, CBOE and NYSE to list exchange-traded funds (ETFs) tied to the price of ether, potentially paving the way for the products to begin trading later this year.

While the ETF issuers also have to get the green light before the products can launch, Thursday's approval is a major surprise win for those firms and the cryptocurrency industry, which until Monday had expected the SEC to reject the filings.

Nine issuers including VanEck, ARK Investments/21Shares and BlackRock, opens new tab hope to launch ETFs tied to the second-largest cryptocurrency after the SEC in January approved bitcoin ETFs in a watershed moment for the industry.

“This is an exciting moment for the industry at large," said Andrew Jacobson, vice president and head of legal at 21Shares, noting it was "a significant step" towards getting the products trading.

Thursday was the deadline for the SEC to decide on VanEck's filing. Market participants were bracing for the thumbs-down because the SEC had not engaged with them on the applications.

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But in a surprise move, SEC officials on Monday asked the exchanges to quickly fine-tune the filings, sending the industry scrambling to complete weeks of work in just days, sources said.

Reuters could not ascertain why the SEC appeared to have a change of heart.

“The introduction of spot bitcoin ETFs has already demonstrated significant benefits for the digital assets and ETF space, and we believe that spot ether ETFs will similarly provide safeguards for U.S. investors," said Rob Marrocco, global head of ETP listings at Cboe Global Market.

Nasdaq and NYSE declined to comment.

When asked about the ether ETFs by reporters at an industry event earlier on Thursday, SEC Chair Gary Gensler - a crypto skeptic - declined to comment. An SEC spokesperson said in an email announcing the approval that the agency would not comment further.