BNYMint’s share price plunged by more than 10 per cent yesterday, and was down as much as 14 per cent on Thursday morning before settling back down.
The shares are trading on the NASDAQ and the New York Stock Exchange.
The shares are up more than 3 per cent this year.
BNY has fallen by about 80 per cent since it hit a new high in September last year.BNY has also suffered a sharp decline in the value of its share market index in recent weeks.
Its index has fallen from an all-time high of 5,859 to a mere 1,959.
The index has dropped more than 50 per cent from its peak at the start of the year.
The stock has lost more than $2 billion this year alone, according to Bloomberg data.
Shares in the US-based company are up 2.2 per cent in 2017, while BNY’s share prices have gained nearly 10 per% this year, according the S&P 500 index.