U.S. stocks moved lower ahead of Monday's first presidential debate between Hillary Clinton and Donald Trump. Meanwhile, Deutsche Bank (DB) - Get Report shares reached a record low after Germany's government said it won't bailout the bank as it faces a $14 billion fine from the U.S. Justice Department. The bank has reportedly set aside roughly $6 billion to handle legal fees. Pfizer (PFE) - Get Report shares moved lower after abandoning plans to break up into two publicly traded companies. It cited high costs that would result from a split. Twitter (TWTR) - Get Report shares were downgradec to underperform from perform by the analysts at Oppenheimer, saying that a potential sale of the social media giant would probably be at a lower price than current valuations. TheStreet's Scott Gamm reports from Wall Street.