At the time, the exchange also expressed concerns about internal control issues related to Bodisen's accounting and financial reporting obligations.

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So from mid June to last Wednesday, UBS's risk-control systems did not detect that these big bets were being placed, because its internal accounting system was showing that bets in the opposite direction had also been placed.

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However, we can provide no assurance at this time that management will be able to report that our internal control over financial reporting is effective as of December 31, 2012, or that our registered public accounting firm will be able to attest that such internal controls are effective.

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