S&P Dow Jones Indices launched three crypto indices in May 2021 - the S&P Bitcoin Index designed to track bitcoin, the  S&P Ethereum Index designed to track Ethereum, and the S&P Cryptocurrency MegaCap Index designed to track both Bitcoin and Ethereum. SPBTC, SPETH and SPCMC started trading on May 3, 2021. Note that these indices track the actual digital asset (i.e. cryptocurrency) not cryptocurrency stocks (i.e. companies in the crypto business).