International Business Machines Corp. (NYSE: IBM ) is one of the biggest losers today, declining 3.5%. Bloomberg explains this movement as follows: International Business Machines Corp. (IBM) fell in German trading after the company cited "challenges" at its server unit, said to be targeted by Lenovo Group Ltd. (992), as one reason hardware profit fell last quarter. International Business Machines Corp. (NYSE:IBM)'s revenue declined for a seventh straight quarter amid plunging demand for servers, the world's biggest computer-services provider said yesterday. The Armonk, New York-based company's hardware unit had a $750 million profit drop partly because of its x86 server business, Chief Financial Officer Martin Schroeter said on a conference call.