One River Digital's index adds tokenized carbon credits as a premium to the bitcoin purchased.
The ETF would buy and dispose of blockchain-based carbon credit tokens to account for the emissions associated with its bitcoin holdings.
Macro fund manager Brevan Howard plans to invest up to 1.5% of its main fund in cryptocurrencies, according to a story in Bloomberg.
Clayton will join the firm's newly formed Academic and Regulatory Advisory Council along with economist Jon Orszag, and former White House adviser Kevin Hassett.
Coinbase and One River Digital worked in tandem to execute U.K mega-manager Ruffer Investment's $745 million bitcoin purchase in November.
A recap of 5+ insanely bullish stories that got buried in the bitcoin price action.