As investors wait in anticipation for the official opening of stock markets, BlackRock's spot Bitcoin exchange-traded fund (ETF), iShares Bitcoin Trust, is already on the move during the so-called 'pre-market'. With just a few minutes left until its debut, the instrument rises almost 25%.

The 'pre-market' refers to the period of trading in the stock markets that occurs before the official market opening. During this period, investors have the opportunity to buy and sell shares on a "secondary" basis outside of regular hours.