U.S. crypto-related stocks experienced a decline at the market open on February 27. BMNR led the losses with a 3.69% drop, while MSTR fell 2.63%, COIN decreased by 3.12%, CRCL declined 3.21%, and SBET dropped 3.61%. This downturn coincided with broader market declines, as the Dow Jones fell 0.75%, the S&P 500 dropped 0.82%, and the Nasdaq decreased by 1.2%. In other market news, Amazon's stock (AMZN.O) fell 0.44% following its announcement of a partnership with OpenAI and a $50 billion investment in OpenAI's new $110 billion funding round.