Barclays ended down 0.6% as former Chief Executive Bob Diamond testified before the Treasury Select Committee.
The scandal sparked the resignations of three Barclays senior board members, including ex-chief executive Bob Diamond.
Last week, Chief Executive Bob Diamond and Finance Director Chris Lucas agreed to cut bonuses until the bank improves its profitability.
The scandal led to the departure of the bank's chief executive Bob Diamond, who was then replaced in August by Antony Jenkins.
Barclays chief executive Bob Diamond has resigned a week after the bank was fined a record amount for trying to manipulate inter-bank lending rates.
Chief executive Bob Diamond resigned in the wake of the affair.
Meanwhile Barclays' chief executive Bob Diamond said in a letter to staff that he would "get to the bottom" of what happened and resolve it.
Ed Miliband significantly hardened his position in the past few days - calling for Barclays Chief Executive Bob Diamond to quit and calling for an inquiry.
Sir David took over as chairman last year after both the former chairman Marcus Agius and chief executive Bob Diamond resigned in the wake of the Libor scandal.
If that seems unfair, in that many would say the chief executive Bob Diamond is more responsible for the mess Barclays finds itself in, this investor would not necessarily disagree.
Fifty one year-old Kvalheim, along with co-President Jerry del Missier, and Chief Executive Bob Diamond, is considered one of the main architects of the investment banking division of British bank Barclays.
He sat next to his right-hand man at Goldman, Gary Cohn, and in the same section as the short-selling hedge fund manager Jim Chanos, Barclays chief executive Bob Diamond and Nasdaq head Bob Greifeld.
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The U.K. banking giant's chief executive, Robert Diamond, resigned as a result of an interest-rate manipulation scandal.
The Libor scandal led to the resignation of Barclays' previous chief executive, Bob Diamond, and chairman Marcus Agius in July.
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Ho , chief executive of the Aaron Diamond AIDS Research Center in New York, which initially evaluated the patient's virus.
And Bill Winters, the former JP Morgan banker, is the front-runner to succeed Bob Diamond as chief executive of the bank.
They don't come in for the criticism that the likes of Bob Diamond (chief executive of Barclays Bank) comes in for.
The current chief executive of Barclays, Bob Diamond, was also in charge of the unit where the manipulations occurred, and is now facing calls for his resignation.
The four most senior, led by Bob Diamond, the chief executive, are waiving their bonuses.
But there was a little bit of respite in what has become almost the national sport of bashing Bob Diamond, the chief executive of Barclays.
Barclays ( BCS - news - people ) CEO John Varley and President Bob Diamond, RBS Chief Executive Stephen Hester is deferring his bonus this year in an attempt to show some humility in front of a British public still angry with the behavior of the banking system.
Mr Diamond resigned as Barclays chief executive the day before he gave evidence to MPs.
There were familiar faces for both camps, with former Saracens rugby director Steve Diamond now Sale's executive director of sport and Saracens fly-half Charlie Hodgson facing his old side for the first time since leaving them after 10 years in the summer.
So the question is why on earth no Barclays' manager ever sought to tell Mr Diamond or any other senior executive that for months they had been systematically telling the Libor-setting committees that Barclays' borrowing costs were lower than was actually the case?
So where does that leave Bob Diamond, Barclays' chief executive - whom some have said should quit, because he ran Barclays' investment bank during the period when its traders were trying to manipulate the important Libor interest rates and when the bank was understating what it had to pay to borrow?
Mr Diamond took over as Barclays chief executive at the beginning of 2011.
Matthew Diamond, company cofounder and chief executive, says he believes investors value Alloy based on earnings before depreciation, interest, taxes and goodwill impairment.
It had been rumored that Barclays Chief Executive John Varley and Barclays Capital boss Bob Diamond were poised to quit the group, following in the footsteps of other recent high profile departures at Merrill Lynch and Citigroup.
MPs also asked if Mr Agius had passed on the FSA's "issues" with Mr Diamond when he was appointed as chief executive.
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