Grayscale Ethereum trust transaction premium reaches 515%

According to Cointelegraph, the cost of Grayscale Investments' Ethereum Trust (ETHE) is $ 90.55, but its current holding of Ethereum is only $ 16.10 per share. This means that investors have to pay a premium of 515%, five times more expensive than in the open market, to buy Ethereum through the Grayscale Ethereum Trust.