This is the job description <a href=" http://thip.vhig.nl/?alpha-peak.pdf ">alpha peak frequency</a> U.S. employers added 148,000 workers last month, well belowthe 180,000 economists had expected. The data was seen assupporting the Fed's decision to maintain its $85 billion inmonthly bond purchases, which has been a major factor in the S&P500's 2013 rally of 23 percent.