Even a decline in the number of Americans applying for unemployment benefits failed to boost stock prices in midday trading Thursday.
The Dow Jones industrial average fell five points, or 0.1 per cent, to 15,099 as of noon Eastern Daylight Time.
The Standard & Poor's 500 index fell three points, or 0.2 per cent, to 1,629.
The Nasdaq composite index, which his heavily weighted with technology stocks, edged up a point at 3,414.
Tesla Motors soared 19 per cent after the electric car maker posted its first quarterly net profit since being founded a decade ago.
Green Mountain Coffee Roasters surged 25 per cent after the company reported that its net income rose 42 per cent.