Deutsche Bank, HSBC and Bank of Nova Scotia have been accused of attempting to rig the price of silver, in a lawsuit filed in the US.
The plaintiff alleges the banks, which set the price of silver each day, abused their position in the market.
Deutsche Bank and HSBC have not commented on the filing, while Bank of Nova Scotia told Bloomberg news agency it would “vigorously defend” itself
A Nigerian anti-corruption agency has begun investigating former ministers alleged to have taken bribes from the German telecoms firm, Siemens.
Siemens was found guilty of paying bribes and was fined 201m euros ($248m) by a Munich court on 4 October.
Names on the court papers that emerged last week included Bello Mohammed Haliru, the late Haruna Elewi and Tajudeen Olanrewaju
Siemens has been fined 210m euros ($248m; £145.5m) by a German court following an investigation over whether workers paid bribes to gain contracts.
Siemens also agreed to pay 179m euros to the tax authorities, after a failure to declare payments properly
Two former Siemens managers have been convicted by a German court of their involvement in paying 6m euros (£4.1m; $8m) in bribes to win contracts.
Andreas Kley, 63, received a two-year suspended sentence for bribery and breach of trust, while Horst Vigener, 73, was given nine months’ probation
Peter Hartz, the official at the centre of a bribery scandal surrounding car giant Volkswagen, has been given a two year-suspended prison sentence.
Hartz, a guiding hand behind former German Chancellor Gerhard Schroeder’s labour reforms, was fined 560,000 euros ($726,000; £369,000).
The former head of personnel at Europe’s biggest carmaker escaped jail after cutting a deal with prosecutors
Volkswagen’s former personnel chief Peter Hartz has admitted making illegal payments to union officials.
The confession, made through his lawyers, came at the start of his corruption trial in Germany.
A one-time advisor to former Chancellor Gerhard Schroeder, Mr Hartz faces 44 charges of breach of trust
The retrial of Deutsche Bank boss Josef Ackermann and five other former board members of mobile phone firm Mannesmann has begun in a Duesseldorf court.
Last year, the six were cleared over their roles in approving bonuses worth about 60m euros (£41m; $76m) related to Vodafone’s purchase of Mannesmann.
The decision was later overturned, reigniting the corruption trial
Czech trade watchdogs have fined a unit of German utility RWE a record $17m (£8.9m) for violating competition laws.
Regulators said RWE’s gas operation, Transgas, had discriminated against regional gas distributors by offering better deals to its own subsidiaries
A City worker employed in a “department from hell” has won about $1.5m damages for bullying.
Helen Green, 36, sued Deutsche Bank Group Services (UK) Ltd claiming harassment by colleagues and a lack of support from bosses
The Financial Services Authority (FSA) has fined Deutsche Bank £6.3m (9.2m euros; $11