::::Citi unit lost $20 mln in Facebook IPO - source::::

<div class=&quot;custm_img_blk&quot;><img src=&quot;http://www.techgig.com/files/photo_1337999701_temp.jpg&quot; border=&quot;0&quot; width=&quot;300&quot; height=&quot;200&quot; align=&quot;left&quot; /></div><p>Citigroup Inc's(<span>C.N</span>) Automated Trading Desk had trading losses of about $20 million from Facebook Inc's(<span>FB.O</span>) botched initial public offering on Nasdaq OMX Group Inc's(<span>NDAQ.O</span>) U.S. exchange, a source with knowledge of the situation said on Friday.</p><p style=&quot;margin: 0px 0px 10px; padding: 0px&quot;>The unit's losses were in addition to claims by market makers Knight Capital Group Inc (<span>KCG.N</span>) and Citadel Securities, which each had losses of $30 million to $35 million.</p><p style=&quot;margin: 0px 0px 10px; padding: 0px&quot;>UBS AG (<span>UBSN.VX</span>)(<span>UBS.N</span>), the other large market maker involved in the IPO of the social networking company on May 18, has not disclosed any losses.</p><p style=&quot;margin: 0px 0px 10px; padding: 0px&quot;>Nasdaq asked firms to detail estimates of losses by Monday night. After that, the Financial Industry Regulatory Authority will evaluate the filings and put out a report on the matter in about four weeks, two sources said.</p><p style=&quot;margin: 0px 0px 10px; padding: 0px&quot;>A technical glitch delayed Facebook's market debut by 30 minutes and many client orders were delayed, giving some investors and traders significant losses as the stock price dropped.</p><p style=&quot;margin: 0px 0px 10px; padding: 0px&quot;>The exchange operator is facing lawsuits from investors and threats of legal action from brokers.</p>

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