J.P. Morgan could be hit with a fine of more than $6bn from US authorities as they pursue the bank over sales of securities to government-backed mortgage companies.
Markets around the world sold off overnight while oil continued to soar, as the prospect of military involvement in Syria's civil war grows.
European financials are among the day's biggest fallers as benchmark French and German indices struggle amid intensifying geopolitical concerns.
Gold has climbed above the $1,400 mark for the first time since June, re-entering a bull market as disappointing US data and worries over Syria push investors into safe havens.
Spanish police say they have arrested a former JPMorgan Chase trader wanted by the United States for allegedly falsifying bank records to cover up $6bn in trading losses.
Alan Gadd has joined Artemis as head of product and distribution development as the group further expands its distribution capabilities.
The poor performance of emerging market equities year-to-date has caused investors to turn to frontier markets in search of better returns.
The FTSE 100 was off around 1% this morning while oil prices climbed, as unrest in the Middle East threatens to escalate.
Charlie Bean, the deputy governor of the Bank of England (BoE), said the Bank has sent a "clear signal" it will not increase interest rates anytime soon as he expressed surprise at investors' reaction to its position.
The US is on course to hit its debt ceiling by mid-October unless the government intervenes, according to Treasury Secretary Jack Lew.