Wall Street’s self-funded watchdog has fined a unit of Barclays $800,000 (€735,000) for violations related to how the bank reported stock trades over a period of more than two years.

Barclays’ ‘dark pool’ saw a 33% weekly drop in the number of shares traded, suggesting a US lawsuit alleging it misled customers continues to weigh on volumes while threatening revenue at its investment bank.

Barclays Plc saw the volume of US shares traded at its ‘dark pool’ rise to the highest since it was sued by New York for allegedly lying to customers of the venue. 

Facebook’s initial public offering is getting less friendly with each passing day.