Welcome to Q4 earnings season.

Alcoa was the first to report, as usual and they set an upbeat tone by reporting 33-cents in earnings compared to 26-cents expected. Revenue was $6.4B compared to $6.02B expected. Shares of the company are up 2% in the aftermarket and that could help stocks rebound tomorrow.

The aluminum giant also forecast a 7% rise in global demand this year, which flies in the face of fears about a global slowdown.

It was a tough day for the commodity currencies but there is some good news here.