German banking regulator BaFin is imposing further fines of €13.0 million ($13.9 million) on major US-based bank Citigroup due to a serious mishap in share sales, the regulator announced on Thursday. In May 2022, a trader at the bank had briefly triggered turbulence on several stock exchanges with a false entry in the bank’s system. According to earlier information from the UK Financial Conduct Authority (FCA), the man actually wanted to sell securities worth $58 million, but actually put a block of shares worth $444 billion up for sale. The bank’s control systems prevented some of the unwante…