Unisys Corp. (NYSE: UIS) shares rose 18.3 percent to $34.72, on volume of four million shares, trumping an average volume of 486,000, after the maker of mainframes reported fourth-quarter sales that topped estimates.

Bank of America Corporation (NYSE: BAC) traded in 101 million shares, making it a volume leader, while only half its daily average. BAC shares were flat at $14.29, as the bank completed the sale of its Balboa Insurance to an Australian concern.

Mueller Water Products Inc. (NYSE: MWA) shares fell 15% to $3.75, on volume of 8.7 million, compared to an average of 1.9 million, after the pipe and valve maker reported a first-quarter loss that was larger than analysts had projected.