The big challenge for markets in the week ahead By: CNBC.com News May 30, 2014 at 17:34 PM EDT The quiet trading days of late May could fade fast as markets brace for a rate cut in Europe and the U.S. monthly jobs report at the end of the week. Read More >> Related Stocks: Apple Automatic Data Processing Barclays Plc ADR BlackRock Sentinelone Inc Cl A