Barclays ( BCS ), Prudential ( PUK ) slid 2.8% while HSBC Holdings ( HSBC ) was off 2.4%. On Thursday, the Federal Reserve maintained rates near zero, citing worries over the state of the global economy, recent market volatility and sluggish domestic inflation. Commenting on the Fed's decision, some analysts said the central bank effectively created a 'third mandate' to sustain global growth, on top of its duties of providing price stability and high employment.