"Libor is critical to the bond markets globally and so for example mortgage rates are indexed off of it, a lot of the swap of activity in the bond market is indexed of Libor, so Libor plays a key role in the valuations of a lot of these bond contracts," George Goncalves, head of US rates strategy at Nomura Securities, told CNBC.
"I think what the chairman, Marcus Agius, has done is bought time for Bob Diamond I think there is more information to come out and I think shareholders will be very anxious to see the full story and I think people will hold fire for the time being," Stephen Peak, head of pan European equities at Henderson Global Investors, told CNBC.
Stocks finished the final trading day of the weak second quarter with a huge bang as Wall Street cheered a surprise agreement by EU leaders to help the region's struggling banks.
U.S. stock index futures jumped Friday after European leaders unexpectedly agreed to take action to bring down Italy and Spain’s borrowing costs and create a single banking supervisory body.
"What is really depressing about this is that it is just one in a long line of issues our banks have had with respect to transparency across the board and the worry is it is going to prompt a much greater regulatory burden going forward and at the end of the day it's going to cost jobs in the financial sector," Michael Hewson, analyst, CMC Markets, told CNBC.
"There are probably twenty banks that have been implicated; I think Barclays might regret being the first ones to settle you may have read the wording of the settlement was actually complementary in terms of their cooperation, unfortunately the noise around the CEO is severe," Chris Wheeler, bank analyst at Mediobanca, told CNBC.
U.S. stock index futures held their losses Thursday, following the jobless claims and GDP data and amid skepticism that European leaders would overcome their differences to form a solution to tackle the ongoing debt crisis.
Barclays will reportedly pay $200 million in penalties to settle a Libor probe. "These Libor rates impact the credit rates, the interest rates that people pay for everything," says Bart Chilton, CFTC commissioner, explaining how Barclays allegedly manipulated the Libor rate and the CFTC's plans to prevent this from happening again.