The US Securities and Exchange Commission (SEC) has asked the Nasdaq, Chicago Board Options Exchange (CBOE) and New York Stock Exchange (NYSE) to fine-tune applications for listing spot Ethereum exchange-traded funds (ETFs), suggesting that the authorities may approve the listings, Reuters reported, citing sources.The authorities will have to decide this week whether or not to approve CBOE's listing of spot Ethereum ETFs issued by VanEck and Ark Investments/21Shares. Sources said the exchange was asked on Monday (20 May) to submit an amended filing the next night (21 May), a request that would generally mean the application would be approved.Still, the report cited an industry member involved in the launch of a spot Bitcoin ETF as saying that the registration of the actual Ethereum ETFs involves hundreds of pages of disclosures. It is hard to imagine that the SEC could have completed the review within May, and that it could take at least 60 days for the review to be approved.