Facebook’s stock price has risen after chief executive Mark Zuckerberg said he is addressing the missteps that have made it hard to reap the benefits of mobile advertising.

US stocks fell sharply again today, with the Dow ones industrial average losing more than 123 points after a surprisingly weak reading on the service sector raised concerns about the continuing impact of higher energy prices.

A bad jobs report today halted Wall Street’s 2004 rally, sending stocks sharply lower as investors cashed in profits from the market’s recent advance.

Stocks finished higher on Wall Street today as investors picked up bargains in an abbreviated post-Christmas session.

Wall Street had a mixed session today as investors applauded a surprisingly strong third-quarter gross domestic product report but nonetheless worried that the increase could not be sustained.