(Reuters) – Global shares edged higher on Friday and Treasury prices tumbled after the U.S. unemployment rate unexpectedly fell to a near four-year low, pointing to improvement in the labor market.

Wall Street, however, erased early gains with the S&P 500 and theNasdaq turning negative in afternoon trading, suggesting the market may struggle to make further progress with third-quarter earnings season starting next week.

The dollar advanced to a two-week high versus the yen and the euro gained as investors sold the U.S. and Japanese currencies, which are often perceived as safe havens.

The United States added 114,000 jobs last month, driving the jobless rate down to 7.8 percent, its lowest since January 2009, the Labor Department reported. Payroll gains for both July and August were revised higher.