Global oil output surges in January, and the IEA says 'short-term risk to the downside has increased.'
More workers were hired and many put in more hours, but overall they produced less, said the Labor Department.
Ford posted fourth-quarter revenue of $40.3 billion, up 12%, as sales increased in three of the company's five global regions.
The 5.1% drop for the month and the 3.5% decline for all of 2015 has economists worried about a pullback in capital investment.
While a survey shows a decline in the growth rate from a year ago, 2015 as a whole was "a very strong year" for the middle market.
But the consumer products giant also expects negative foreign exchange effects to continue to eat into total sales numbers.
Only 27% of CEOs polled by PwC expect global economic growth to improve over the next 12 months and two-thirds see more threats to their businesses.
'Unless the key transitions in the world economy are successfully navigated, global growth could be derailed,' said the IMF's chief economist.
The luxury jeweler cut its earnings guidance for the fiscal year ended January 31, lowering adjusted earnings by about 10%.
The weak PPI data suggests inflation will not increase enough for the Fed to raise interest rates again this spring.