BROOKFIELD, Wis.—Fiserv, Inc. (NASDAQ: FISV), a leading global provider of financial services technology solutions, announced today that its ACCEL/Exchange® payments network had another record-setting year, processing more than 1.5 billion transactions in 2011, an increase of nearly 29 percent over 2010. ACCEL/Exchange payments network from Fiserv is one of the fastest-growing payments networks in the industry, supplying the infrastructure for financial institutions to give cardholders around-the-clock access to their demand....