JPMorgan Chase lawyers have demanded that Bloomberg hand over five years of internal staff logs, in another sign of disquiet among financial firms over the extent of a snooping scandal at the market data vendor.
News of the probe is another blow for Bloomberg after it confirmed earlier this week that journalists at the firm had monitored page views and log-ins by traders using its desktop data terminals.
"Our legal department sent a formal request to Bloomberg to verify exactly what information reporters had access to and confirmation of their controls to prevent future breaches," JPMorgan Chase said in a statement.
Bloomberg CEO Daniel Doctoroff sought to draw a line under the scandal on Monday by outlawing the practice and creating a new role of client data compliance officer to tighten up procedures.