Hashdex has proposed a combined Bitcoin and Ether exchange-traded fund (ETF) to the US Securities and Exchange Commission. The ETF would balance the crypto assets according to their market caps, tracking the daily market movement on the Nasdaq Crypto US Settlement Price Index. The ETF would not invest in other spot assets besides BTC and ETH. Coinbase and BitGo will serve as custodians for the BTC and ETH assets. Hashdex is still required to file and receive SEC approval on an S-1 application, with a final decision expected no later than March 2025.